Keyless Go - W HO KG (GC,RP)

Transcription

1 Keyless Go - W HO KG (GC,RP)

2 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

3 Keyless Go (KG) Topic Layout Introduction Function & Purpose Advantages Identification Customer operation Operation overview Components KG CAN Key Control modules Antennas Details of operation Module 8-1 Appendix 3

4 KG Function & Purpose Locking Convenience closing of windows and roof Unlocking Arming and disarming the alarm Switching on accessory circuits without starting engine Starting engine Stopping engine Advantages of KG Keyless operation Unlikely that owner will be locked out of vehicle with KG key left inside 4

5 Identifying KG Option A number on the KG key Number on a KG key starts with 175 All exterior door handles have push button for locking Engine start/stop button on gear selector lever Lock button (1) at trunk lid 5

6 To Lock Vehicle: With Keyless Go key present: Press black button on door handle or button (1) at trunk lid - Convenience closing of windows is possible only with door buttons or infrared (movement stops when button is released) - Keyless Summer opening is not possible 6

7 To Unlock Vehicle at Door: With Keyless Go key present: Pull handle to activate switch on inside of door handle That door will Pop open when the handle is pulled Note: In selective unlocking mode, activating any door handle other than driver s will cause global unlocking Summer opening is only possible using infrared signal from remote control key 7

8 To Unlock Vehicle at Trunk: With Keyless Go key present: Operate trunk release lever (green arrow) Only trunk lid will unlock Upon closing, the trunk locks again and alarm is reset KG will not allow trunk to latch if a key is left inside Activating key lock switch (S134) will prevent KG unlocking at trunk 8

9 To Switch On Ignition or Start Engine: With Keyless Go key present: Press button once for circuit 15R Press button twice for circuit 15 Press button a third time with doors closed for circuit 15C Pressing button with brake pedal activated and gear selector in P will start engine Note: If key is removed after a KG start, instrument cluster warnings will occur and engine may shut off while driving 9

10 To Switch Off Engine: Place transmission in P and press button 10

11 To Adjust Seat Position After unlocking with KG remote key: With door open, seat can be adjusted with switches With door closed, engine off: Tap start button on gearshift twice, without actuating foot brake Tap start button on gearshift once, with foot brake actuated (starts engine) Key-dependant seat memory As known from SmartKey-equipped vehicles 11

12 Operation Overview (Example: Unlock request at driver s door) 1. With key present, switch on inside of driver s door is activated 2. Door handle switch is connected to the rear door KG control module 3. Rear door KG control module communicates request to Electronic ignition Switch (EIS) 12

13 Operation Overview (cont.) (Example: Unlock request at driver s door) 4. EIS transmits command signal to left rear door KG control module 5. Left rear door KG control module uses its integrated antenna to send out a radio frequency (RF) signal to wake up the KG key 6. Key within range of antenna wakes up 13

14 Operation Overview (cont.) (Example: Unlock request at driver s door) 7. Key transmits authorization code via RF 8. RF signal is received by rear window antenna, which is connected to right antenna amplifier module 9. Right antenna amplifier module sends signal to rear KG module 14

15 Operation Overview (cont.) (Example: Unlock request at driver s door) 10. Rear KG module sends key data to EIS 11. EIS provides KG authorization. Central Locking System 12. EIS generates an unlock command plus a signal to Left rear door KG control module to pop open driver s door when handle is pulled 15

16 KG Components in Detail 16

17 KG Remote Control Key (A8/1) LED Includes chip card function No need to carry chip card plus remote control key for emergency purposes Integrated metal emergency key Up to 8 KG remote control keys can be authorized at one time LED indicates changeover from selective to global unlocking and vice versa LED flashes when key responds to a wakeup request If LED on does not light: replace batteries 17

18 Components on the KG CAN Rear KG module Interior compartment module KG CAN EIS Left rear door KG module Right rear door KG module 18

19 Electronic Ignition Switch (N73) Incorporates functions performed by a separate KG control module on S, CL and SL models. Connected to CAN C, CAN B and the KG CAN Determines source of locking / unlocking request in order to operate appropriate wake-up antenna Determines source of unlocking request in order to operate appropriate door opening assist motor 19

20 Rear KG Module (N102) Located on left side of trunk area 5 connectors Connected to KG CAN Power supplied by F34f24 (Circuit 30) Discrete wire to trunk lid push button switch 2 3 Controls wake-up signal from rear bumper antenna (A2/31) and Trunk KG antenna (A2/35) Receives RF signal from right rear window antenna amplifier (A2/65) and transmits it to EIS over KG CAN 20

21 Interior Compartment Module (N103) Located behind ashtray, center console Integrated antenna Connected to KG CAN Receives signal from key to detect key inside vehicle Power and ground supplied by Rear KG Module (N102) 21

22 Left and Right Rear Door KG Control Modules (N69/8 & N69/9) Antenna A2/39 Antenna A2/41 Each rear door KG control module has an associated antenna Connected to KG CAN Power supply for both: F34f24 (Circuit 30) Responsible for operating Door Opening Assist Motors 22

23 KG Door Opening Assist Motors KG CAN R L M57 & M57/2 (left) and M57/1 & M57/3 (right) Pops door open when an unlock request is accompanied by a pull on that door handle Not used when opening an unlocked door Located next to door lock motors (M14/5,6, 8 or 9) Can be checked using EIS Actuations 23

24 KG Door Handle (S17/19, 20, 21, 22) KG door handle switches at each door, with discrete wiring to the rear door KG control module located on same side of vehicle. Unlocking grip handle (pull) microswitch Black, on inner side of handle Lock (push) button on each door Black button on outside of handle 24

25 Trunk Unlocking Handle (S88/8) & Trunk Lid Pushbutton Switch (S62/21) Trunk Unlocking Handle Discrete wire to rear SAM (N10/2) Rear SAM informs EIS via CAN B Remote trunk release operates Trunk Lid Pushbutton Switch Discrete wire to rear KG module (N102) S88/6 provides signal to rear SAM to ignore any request to open trunk Functions as a locking request when pressed Rear KG module informs EIS via KG CAN 25

26 Start /Stop Switch (S2/3) & Electronic Selector Module (N15/5) Start / stop switch (S2/3) connected to EIS by a discrete wire Electronic Selector Module provides Park position signal to EIS over CAN C Brake switch signal required when starting engine. Information flow: Brake switch > SBC hydraulic unit > Rear SAM > CAN B > EIS 26

27 Antennas Used to Wake-up Remote Control Key Key in zones A, B or C will wake-up for external locking and unlocking Key in zones D or E will wake-up for starting engine 27

28 Interior Compartment Module with Antenna Integrated antenna confirms that key is inside vehicle while driving 28

29 Rear Door KG Control Module Antennas Antenna A2/39 Antenna A2/41 Each rear door KG control module has an associated antenna Antenna output controlled by a KG CAN signal from EIS 29

30 Trunk KG Antenna (A2/35) Located at front left of trunk area - visible when accessing spare tire Discrete wire to rear KG module (N102) Output controlled by rear KG module 30

31 Rear Bumper Antenna (A2/31) Beneath rear bumper Discrete wire to rear KG module (N102) Output controlled by rear KG module 31

32 Requesting Locking & Unlocking KG CAN Door handle switches Rear door KG modules Trunk switches Rear SAM Rear KG module CAN B EIS 32

33 Requesting Engine Start Park CAN C Electronic Selector Module Brake switch EIS SBC hydraulic unit CAN B Rear SAM 33

34 Waking-up the Remote Control Key Rear bumper antenna Trunk KG antenna Dotted line = RF signal EIS Rear KG module Rear door KG modules KG CAN Interior compartment module 34

35 Remote Control Key Replies Right antenna amplifier module Rear window antenna Rear KG module KG CAN EIS 35

36 When Locking or Unlocking is Authorized: CAN B KG CAN (When unlocking) Command to lock, unlock or operate remote trunk release Rear door KG control module KG Door Opening Assist Motor 36

37 Engine Start Authorization Electronic Steering Lock EIS CAN C ME-SFI control module Note: Engine shut-off request does not require EIS to authorize the remote control key 37

38 KG Locking / Unlocking Notes In selective unlocking mode: if any door handle except the driver s door handle is grasped by the holder of the KG key, the vehicle will unlock globally If unlocked using KG, the vehicle will re-lock after seconds if no door is opened Summer opening is only possible using infrared signal from remote control key Convenience closing not possible from trunk switch 38

39 W211 Keyless Go (KG) Group: Control unit designation: N73 U.S. Introduction: MY2003 Major components: Master keys Pushbutton start/stop switch Door antennas Interior compartment module/antenna Trunk area antenna Rear bumper antenna Door handle switches Door open assist solenoids (1 per door) Trunk switch CAN(s) used CAN B, CAN C, KG CAN Mils: no Warning messages in ICM? Yes DTC capable? Yes Control unit adaptation? Assign transmitter card to key track Requires control unit adaptation in: ICM 39

40 Acronyms Used in This Presentation CAN DAS DCM DTB ECM EIS ESL ESM IC(M) KG LED RF SAM SDS Controller Area Network Diagnostic Assistance System Door Control Module Dealer Technical Bulletin Engine Control Module Electronic Ignition Switch Electronic Steering Lock Electronic Selector Module Instrument Cluster (Module) Keyless Go Light Emitting Diode Right Front Signal Acquisition Module Star Diagnosis System 40

41 Appendix MBUSA Technical Training website: > Information Access (The maker of the R209 / W211 KG system) WIS group for the particular model Unlocking function: GF80.61-P-2009T (W211) Locking function: GF80.61-P-2010T (W211) NETSTAR information W211 Self-Study material 41

42 Tire Pressure Monitoring (TPC) 319 HO 10 TPC (GC,RP)

43 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

44 General Information TPC constantly monitors tire pressure Pressure and temperature values are sent from the wheels to antennas using radio frequency Antennas are connected directly to TPC module Ambient temperature and fuel level are supplied via CAN-B TPC module evaluates data and passes it on to the instrument cluster module (ICM) via CAN-B ICM display informs / warns driver of: Sudden pressure loss Pressure too low TPC system failure External interference Low battery in sensor 3

45 Advantages Early warning when sudden pressure loss occurs Avoid blowouts due to high speed / low pressure conditions Driver is alerted to the need to check tire pressure Pressure can be checked electronically Tire wear reduced (-0.3 bar = 25% reduction in service life) Increased fuel mileage 4

46 Survey of Pressure Checking Habits % Of passenger car drivers who check tire pressure: Weekly 8.76 % When tires seem low % When serviced % Before long trip 0.99 % Other 6.46 % Do not check 6.56 % In a random check of 6442 cars stopping at gas stations: 36% had one or more tires that were at least 20% under-inflated. 26% had one or more tires that were at least 25% under-inflated. (Source: NHTSA study) 5

47 Important Points: How to read out tire pressures electronically How TPC is networked and how it gathers data Part locations What to look for during a tire change How to read information on a wheel sensor How to install a wheel sensor When and how to activate What typical faults might be displayed Service tips for working on TPC 6

48 7 TPC Function-typical (W220 video)

49 Electronic Tire Pressure Check Electronic check: 1. Call up the odometer display by pressing steering wheel buttons (2) 2. Display tire pressure by pressing steering wheel arrow buttons (v) Four values are displayed In either bar or psi Blanks indicate that no values are stored This is also the display you ll see after performing an activation to store new pressure values 8

50 Basic TPC Components CAN-B 4 wheel sensors: - Pressure - Temperature 4 Antennas in wheel housings TPC module Instrument Cluster Module - Readout values - Display warnings - Vehicle speed input 9

51 Wheel Sensors and Antennas Transmission intervals New sensor inoperative until 1.5 bar applied for > 3 minutes Normal conditions: Measure once every 3 seconds, transmit once every 55 seconds When pressure drops >0.2 bar / minute: Measure and transmit once every 0.8 second 10

52 Wheel Sensor and Valve Components Plastic cap 11mm T20 Valve (Aluminum) Lock nut Spacer ring Within the sensor: - Lithium Battery - Pressure sensor - Temperature sensor Hollow screw - 315MHz Transmitter Plastic cap prevents corrosion 11

53 Wheel Sensor Battery Battery not replaceable Battery life approximately 7 years With each data transmission, the sensor reports on remaining battery life DAS can be used to check remaining battery life (in months) Production date (july 15,1999) stamped on sensor 12

54 W211 TPC Module (N88) At left side of trunk, behind rear SAM Task: Receive tire pressure and temperature info from wheel sensors. Process info received via CAN-B and determine if tire pressures are OK. T.30 Power and ground supplied by N10/2 13

55 Additional Inputs to TPC CAN-B Front left SAM - Ambient temp - Charging volts Rear SAM - Fuel level - Trunk lid status Central gateway - Country - Vehicle specific info EIS - Ignition on 14

56 Tire Service Stay clear of wheel sensor to prevent damage With tire removed, check condition of wheel sensor - no need to remove sensor from wheel to do this! Before mounting tire, check date stamp on sensor Replace sensor if over 5 years old 43a Wheel weight 43g Wheel sensor (~32 grams) 15

57 Wheel Sensor Inspection White filter on underside of sensor Don t remove it No compressed air or detergents Use a clean, lint-free cloth Replace entire sensor if: Damaged Too dirty to clean Tire sealant was used Over 5 years old Replace valve if: It has been removed Screw or nut is loose 16

58 Installing Wheel Sensor Electronic ID number Always use new valve 315mhz must show on U.S. Sensor Record electronic ID number of sensor 2.0mm hole in valve must face upward Spacer has 45 bevel on both sides When installing new sensor, use 2.0mm pin (6) to counter hold valve (2) while tightening lock nut (4) Hollow screw and nut both torqued to 4nm

59 Electronic Identification Number Each sensor has a unique, wheel electronic identification number that it sends to the TPC module with each data transmission The TPC module must learn this number and identify it with a specific wheel position on the vehicle 433MHz indicates European standard (US version = 315MHz) The wheel electronic identification number is stamped on the sensor 18

60 Activation means: Activation Notes Clearing old tire pressure specifications from TPC memory Storing new tire pressure specification values for each wheel Activation is performed when: Setting a different inflation pressure base-line value Cluster says to re-activate TPC Tires are rotated Winter tires are mounted A wheel sensor has been replaced The TPC control module has been replaced A TPC fault code has been erased Activation is initiated using steering wheel & ICM buttons and completed by driving the vehicle 19

61 Learning Wheel Sensor Location Before new tire pressure specification values can be stored, the TPC module must have learned the wheel sensor identification numbers and matched those numbers with their specific location on the vehicle The fastest way for the TPC module to learn this information is by entering it into TPC memory using the DAS program. ( Control unit adaptations > settings ) Activation will occur faster if sensor locations are already known The slower method of learning is to simply perform an activation. While driving, first the wheel sensor locations will be learned and then the new pressure specifications will be stored TPC will have to determine sensor location by measuring field strength at the antennas TPC must receive a greater number of clear signals from each sensor 20

62 TPC Activation Procedure 1. Vehicle stationary 2. Tire pressures set correctly 3. Engine OFF / Ignition ON 4. Use steering wheel buttons (2) to scroll to 0 mph display (S110s1) 21

63 TPC Activation Procedure 5. Use steering wheel buttons ( / ) to display tire pressure screen 6. Tap the reset button (A1r1) 22

64 TPC Activation Procedure This will be the next screen: 7. Press the + button (S111s1) on steering wheel to bring up the next display... 23

65 TPC Activation Procedure Activation now begins This screen indicates that previous settings have been cleared 24

66 TPC Activation Completed After driving minutes, display will suddenly show four actual pressures. (Remember: 1 signal every 55 seconds) System is then activated, with new values stored If the values you are trying to set are implausible, cluster will display: tire pressure / check tire 25

67 TPC Messages Are Displayed in ICM Example shown: system shut-down due to outside interference Function or operation warnings are displayed in white Red warning display = major loss of pressure 26

68 Function Warnings Tire pressure monitor / Visit workshop CAN, component, sensor battery, DTC is stored Tire pressure monitor temporarily inactive During initialization, external interference, temp. >120 C, additional wheel sensors in vehicle Tire pressure monitor activated During activation - pressures show after driving a few minutes Tire pressure monitor / Reactivate Pressure is 0.3 bar above stored value, or after replacing N88 27

69 Operation Warnings Tire pressure / check tire - Pressure in one or more tires dropped >0.2 bar (2.9 psi) below stored pressure. Message shows for 30 sec. After every start-up - Pressure difference >0.4 bar (5.8 psi) between tires on same axle - Pressures too low, temperature OK (<120 C) - After an activation request with implausible pressure adjustment 28

70 Operation Warnings Displayed in RED Tire pressure LF / check tire Pressure in one or more tires has dropped to 0.4 bar (5.8 psi) below the stored pressure Specific tire may not be indicated Message displayed continuously Tire Pressure LF / Caution Tire Defect - Pressure loss >0.2 bar (2.9 psi) per minute - Specific tire location indicated - Stop immediately and install spare wheel / tire 29

71 Service Tips When an antenna or sensor problem is suspected, remount wheel to different location, erase DTC and see if problem moves. This will eliminate antenna, wiring, ECU, etc. Initializing first will make this faster. When using wheels without pressure sensors, deactivate TPC using DAS ( control unit adaptations > read coding and change if necessary > monitoring function > F2 > select not active, then transfer coding into control unit.) When TPC is deactivated, client will get a white message, tire pressure controlreactivate each time engine is started. 30

72 Acronyms used in this Presentation CAN DAS DTC ECU EIS ICM ID mph MHz NHTSA PDI psi SAM TPC VSS Controller Area Network Diagnostic Assistance System Diagnostic Trouble Code Electronic Control Unit Electronic Ignition Switch Instrument Cluster Module Identification mils per hour Megahertz National Highway Transportation System Administration Pre-delivery Inspection pounds per square inch Signal Acquisition Module Tire Pressure Monitoring Vehicle Speed Signal 31

73 Tire Pressure Monitoring (TPC) Group: Control unit designation: N88 U.S. Introduction: MY2001 Major components: TPC module (N88) Wheel sensors (A69/1-4) Antennas (A2/44-47) Related control modules: Driver-side SAM (N10/1) Rear SAM (N10/2) Central gateway (N93) EIS (N73) Instrument cluster (A1) CAN(s) used: CAN-B Mils: no Warning messages in ICM? Yes DTC capable? Yes Control unit adaptation? Activation with driver controls Requires control unit adaptation in: ICM 32

74 Appendix W211 Self-study material Parts listed in group 54, electronic parts catalog RDK is the German acronym MBUSA Technical Training website: > Information Access Web site contains a study of 10 monitoring systems. System E (the Beru system on a BMW) is the one most like the MB system. Another interesting article on the need for tire pressure monitoring: The first part of the NTHSA ruling on TPM: 33

75 W211 Dual Battery System 219 BCM (ACB-ICC)

76 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

77 Program Highlights Power distribution - pre-fuse diagram - pre-fuse locations Dual battery on-board electrical system components - systems battery - auxiliary battery - battery control module - auxiliary battery relay - cut-off relay for interruptible loads Dual battery functional description - normal modes - failure modes - charging auxiliary battery 3

78 W211 Dual Battery System Function An auxiliary battery supplies electrical energy for a limited time if the systems battery voltage is low. 4

79 Systems Battery (G1) Location: (G1) installed in trunk 5

80 W211 Systems Battery (G1) Systems Battery: 12V, 95 Ah, 520A (DIN) Absorbent Glass Mat (AGM) design, also known as Valve Regulated Lead Acid (VRLA) type Function - Primary power source for all vehicle electrical systems 6

81 Location of Auxiliary Battery (G1/7) Auxiliary battery installed below air intake of HVAC 7

82 Location of Auxiliary Battery (G1/7) Shown with HVAC air intake / filter removed 8

83 Auxiliary Battery (G1/7) Auxiliary Battery: 12V, 12Ah, 170 A (DIN) Absorbent Glass Mat (AGM) design Function - Provides supplemental power if systems battery (G1) voltage is low 9

84 AGM / VRLA Battery Properties Longer service life Improved cold starting characteristics Improved deep cycle performance No liquid acid spills or leaks Fast recharge time Completely maintenance free 10

85 AGM / VRLA Battery Testing Requires the new Midtronics MCR 717 tester and printer Tester measures battery conductance by inducing A/C voltage of a given frequency and amplitude on the battery posts and monitoring the current flow in response to it Discard the acid density sheet, and enter test code (recorded by tester) on warranty claim forms Battery replaced under warranty must have a test printout attached to the R.O. Detailed information about testing, and using the MCR717 can be found in WIS SI54.10-P

86 Front Pre-fuse Box (F32) Location: Passenger footwell 12

87 Pre-fuse Box (F33) F33 Location: Front of spare tire well 13

88 Pre-fuse Power Distribution F32 F33 Res. N22 N10/11 K67 A7/3 A7/3 M4/7 f77 f76 f75 f74 f73 f72 f71 f70 40 A 40 A 40 A 40 A 50 A 150 A 150 A N10/1 N10/2 N10/1 F34 N82 N112 and A35/11 X58/1 M40/1 f78 f79 f80 f81 f84 f85 f86 f A 200 A 150 A 150 A 5 A 5 A 5 A 40 A Res. f89 M1 G2 K57/2 G1/7 - + N82 G

89 Legend: Pre-fuse Block Power Distribution A7/3 Traction system hydraulic unit A35/11 Voice recognition module (VCS) F32 Front pre-fuse box F33 Rear pre-fuse box F34 Interior fuse box (left of instrument panel) G1 Systems battery G1/7 Auxiliary battery G2 Alternator K57/2 Auxiliary battery relay K67 AIRmatic relay N10/1 Driver signal acquisition and actuation module (SAM-D) N10/2 Rear signal acquisition and actuation module (SAM-R) N10/11 Passenger signal acquisition and actuation module (SAM-P) N22 Air conditioning control module N82 Battery control module N112 Communication platform (CP) M1 Starter motor M4/7 Electric suction fan with integrated control M40/1 Pneumatic pump of dynamic seat control X58/1 Interior socket 15

90 Battery Control Module (N82) Location: Rear of spare tire well 16

91 Function of N82 1. Monitors the voltages of (G1) and (G1/7) 2. Monitors alternator voltage (terminal 61) via CAN B 3. Controls auxiliary battery relay (K57/2) 4. Controls consumer prioritization function 5. Optimizes charging of auxiliary battery (G1/7) 6. Notes emergency operation and sets fault codes (CAN communication / DTC s) 7. Notes emergency operation resulting in IC / MF fault message displays 17

92 Auxiliary Battery Relay (K57/2) Location: Below windshield wiper cowl plastic trim Function: Controlled by N82 De-energized during normal operation (N.O.) Energized to recharge G1/7 Energized if engine running and system voltage low Connects G1/7 to electrical consumers 18

93 Cut-off Relay for Interruptible Loads (K75) K75 or K75 Function: Controlled by N82 Location: LF SAM (N10/1) De-energized during normal operation (N.C.) Energized during emergency operation Opens 30/15R to cigar lighter (R3r1), and 12V socket (X58/1) rear of center console during emergency operation 19

94 Normal Mode Kl. 30 CAN-B F33 - Battery control module monitors voltages and calculates the condition of both batteries N82 Kl. 31 F G1/7 - G1 + E E F32 - Monitors total current consumption through common ground - Consumer prioritization off Relay K57/2 de-energized F30 Polyswitch fuse F32 Front pre-fuse box F33 Rear pre-fuse box K57/2 G2 M1 G1 Battery G1/7 Auxiliary battery G2 Alternator K57/2 Auxiliary battery relay M1 Starter N82 Battery control module 20

95 Multi-Function Display Fault Messages 21

96 Consumer Prioritization If, for example, the alternator fails: Both consumer prioritization stages (1 and 2) are immediately activated via the CAN A red warning info appears in the instrument cluster The auxiliary battery is not engaged until G1 voltage is low If, for example, N82 determines the load capacity of systems battery (G1) is inadequate: Stage 1 consumer prioritization via CAN Stage 2 consumer prioritization via CAN (if deactivating stage 1 consumers was not adequate) The auxiliary battery is connected and the red warning then appears in the instrument cluster 22

97 Emergency Mode N82 Kl. 30 Kl. 31 CAN-B F K57/2 F30 Polyswitch fuse F32 Front pre-fuse box F33 Rear pre-fuse box - + G1/7 G2 M1 - G1 + F33 E E F32 G1 Battery G1/7 Auxiliary battery G2 Alternator Engine running, systems battery low: - Consumers deactivated in 2 stages by CAN messages - Fault messages in instrument cluster indicate deactivation of consumers - Auxiliary battery relay (K57/2) is energized. Auxiliary battery is connected for supplying power to electrical consumers K57/2 Auxiliary battery relay M1 Starter N82 Battery control module 23

98 Auxiliary Battery Charging Mode N82 Kl. 30 Kl. 31 CAN-B F F30 Polyswitch fuse F32 Front prefuse box F33 Rear prefuse box - + K57/2 G1/7 G2 M1 - G1 + F33 E E F32 G1 Battery G1/7 Auxiliary battery G2 Alternator - Battery control module detects insufficient voltage at auxiliary battery - Auxiliary battery relay (K57/2) is activated for a short period of time if primary system voltage is above 13.5V - Auxiliary battery is charged by alternator through auxiliary battery relay (K57/2) - This charging cycle will only occur once per ignition cycle K57/2 Auxiliary battery relay M1 Starter N82 Battery control module 24

99 Dual Battery System Diagram CAN B N10/1 - circuit 61 N73 - ignition key inserted N93 - diagnosis G1 - systems battery sensing N10/2 - trunk switch G1/7 - auxiliary battery sensing A1 - warning messages 25

100 Normalization: Dual Battery Service Tips If the systems battery is disconnected or dead, the following systems should be checked for normal operation. If systems are inoperative or erratic then normalization will have to be performed. Potential systems requiring normalizing are: ESP AAC - automatic air conditioning Left front seat Right front seat Windows and sunroof Adding additional electric accessories: Steering wheel and mirrors When adding accessories always use a power supply that is fused through the pre-fuse boxes. This will ensure that the BCM can monitor the current consumption accurately. DO NOT CONNECT ACCESSORIES DIRECTLY TO BATTERY TERMINALS 26

101 Appendix WIS doc.# AH54.10-P A AR54.10-P A OF58.40-P A GF54.10-P-4201T GF54.10-P-1001T GF54.21-P T Topic Notes on AGM battery construction, and properties Battery test using Midtronics MCR717 Order form for Midtronics MCR717 Auxiliary battery relay, location, and function Two-battery vehicle power supply, function Vehicle power supply control module, task ETM doc # PE54.15-P-2502DA PE54.15-P-2503DA PE54.15-P-2501DA Internet Sites Pre-fuse F32 wiring diagram Pre-fuse F33 wiring diagram Pre-fuse F34 wiring diagram Total battery management (AGM) charging, testing 27

102 Distronic Cruise Control for Model HO DTR (GC,RP) DTR: Distance Tracking Radar 1

103 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

104 Important Points: DTR is a further development of cruise control DTR is a convenience system... not a safety system DTR will reduce speed when necessary in order to maintain a selected following interval DTR information is displayed in cluster Additional components necessary for DTR operation Checks, adjustments and adaptations necessary for DTR DTR works closely with ESP, ME-SFI and ETC Answers to common DTR complaints 3

105 DTR is Cruise Control and More... With no vehicle ahead, DTR will operate like normal cruise control Downshifting to slow the vehicle when going downhill Slowing the vehicle when set speed is toggled lower with switch With a vehicle ahead, DTR will control the following interval Driver selects desired following interval DTR will reduce the speed difference to match the lead vehicle DTR will warn driver audibly, and in the instrument cluster display if closing speed to lead vehicle is too high 4

106 How DTR Lowers Vehicle Speed Reduces engine torque DTR > ESP > ME-SFI Downshifts when going downhill DTR > ESP > ETC No lower than 3rd gear Applies brakes when going downhill DTR > ESP > SBC 10% or less braking is normally sufficient 20% maximum braking is possible 5

107 Switching DTR On and Adjusting Speed DTR is switched on when switching on cruise control (S40) Tapping upwards (1) or downwards (2) changes the SET speed to the next ~ 5 mph increment. (ie: starting at a set speed of 62mph, you would change to either 65 or 60mph) Tapping the switch in the RESUME direction (4) increases the set speed in 1 mph increments. 6

108 Display When Switching On DTR The word Distronic (1) will be displayed Audible warning symbol appears when function is enabled The selected speed will be displayed for ~ 5 seconds 7

109 Notes on Switching DTR On and Off DTR will not engage: For up to 2 minutes after engine start-up This is the initialization / self-test phase <25mph If parking brake is activated If ESP has been switched off manually If gear selector is not in position D DTR will switch OFF for the same reasons cruise control switches off 8

110 DTR Controls on Center Console 1) Audible warning on-off switch (S46/8s1) 2) Indicator light - Light ON means audible warning ON 3) Potentiometer for regulating following interval from 1-2 seconds (S46/8r1) 9

111 Additional Information From Display 1) Lead vehicle 4) Vehicle driven 2) Distance to lead vehicle 5) Audible warning ON 3) Minimum following distance calculated from selected following interval (1-2 seconds) 10

112 Operating Notes Note: DTR screen can be displayed in cluster while driving without engaging cruise control (the word Distronic doesn t appear) Audible DTR warnings are active without cruise control engagement, unless switched off by driver DTR will not apply the brakes to slow the vehicle while driver is using accelerator to exceed the DTR speed setting System is designed to work with moving objects 11

113 Display when Overtaking Another Vehicle Information and warnings displayed as a result of CAN C data received from DTR control module: Distronic = Distronic is engaged Desired speed set at 130km/h (1) Vehicle speed has been reduced to 80km/h to match speed of lead vehicle Minimum following interval set by driver to approximately 35 meters 12

114 13 What DTR Sees :

115 14 Detection Challenge:

116 15 Detection Challenge:

117 16 Detection Challenge:

118 DTR module (N63/1) DTR Network ICM (A1) SCM (N80) CGW (N93) CAN C Radar sensor (B29) ESP (N47-5) ME-SFI (N3/10) ETC (N15/3) 17

119 DTR Control Module (N63/1) Task Provide power for radar sensor Detect vehicles ahead Determine need for and request necessary intervention Control ICM displays and warning signal Design 3 connectors, 1 is coaxial from B29 Function Interpret radar sensor data Assess pertinent CAN C data Location Front passenger floor 18

120 Instrument Cluster Module (A1) CAN C Displays information and warnings sent by DTR module Audible warning actuated Visual warning actuated 19

121 Steering Column Module (N80) S40/4 N49 N80 Input from Steering angle sensor (N49) and cruise control switch (S40/4) is received by Steering Column Module (N80). Data is then sent to CAN C CAN C 20

122 Central Gateway (N93) CAN B Upper Control Panel (N72/1) Console switches (S46/8) Audible warning switch Following interval potentiometer CAN C National code information 21

123 ESP, ME-SFI and ETC CAN C DTR (N63/1) ESP (N47-5) ME-SFI (N3/10) ETC (N15/3) Wheel speeds Brake control Torque control DTR shut-off Rotational speed and lateral acceleration Vehicle code Engine torque RPM DTR on Actual gear Target gear Downshift control 22

124 DTR Radar Sensor (B29) Task: Transmit radar signals forward and receive the reflected signals. Transmit processed analog data over coaxial cable directly to DTR control module. Data used by DTR to detect objects: Distance to object Speed of object Angle to object Radar segment used Intensity of reflected beam 23

125 3 Radar Sensor Beam Segments Feet º 3º º Width of 3º Radar beam segment at 328 (100meters) 24

126 25 Detection Challenge:

127 26 Detection Challenge:

128 Radar Sensor Adjustment to be Performed ONLY by Technicians Completing TECH234 Alignment Course Checking aim of radar sensor (B29) is necessary when: Radar sensor (B29) has been replaced Any repairs have been made to front end of vehicle that affect position of radar sensor (B29) Wheel alignment has been adjusted Results of DAS Object Recognition Check indicate that it should be done 27

129 DTR Control Unit Adaptation Adaptation is necessary after: Replacement of DTR control module (N63/1) Replacement of steering angle sensor (N49) Removal of steering wheel Replacement or adjustment of radar sensor (B29) Exchange or repair of chassis components including setting wheel toe What is being adapted : DTR control module with steering angle sensor, radar sensor, lateral/yaw sensor, and wheel speed inputs How to do it: Connect DAS to vehicle>select DTR>select Control unit adaptations>answer YES 28

130 Service Tip Before working on DTR...Check for and correct faults in all drive and chassis systems Remember DTR works together with Electronic Stability Program (N47-5) Steering Column Module (N80) ME-SFI (N3/10) Electronic Transmission Control (N15/3) Electronic Ignition Switch (N73) Instrument Cluster (A1) Vehicle level control system 29

131 ICM Message Meaning Distronic Malfunction Clean Sensor DTR is automatically switched off Message can be cleared after cleaning by switching ignition off/on No fault codes are stored(see exception below) Possible causes : Dirt, snow or ice build up on the radar sensor. (The display shows ---, instead of the current vehicle speed.) Heavy rain, mist or fog which can dampen radar signals enough to cause difficulty in detecting vehicles ahead. Road spray may cause warning chime and temporary shutdown of DTR (Extended exposure will cause a DTC) 30

132 Distronic (DTR) Group: Control unit designation: N63/1 U.S. Introduction: MY2001 Major components: DTR Control Module (N63/1) Radar Sensor (B29) Steering Angle Sensor (N49) Cruise Control Switch (S40/4) Console Switches (S46/8) Electronic Ignition Switch (N73) Instrument Cluster (A1) Electronic Stability Program (N47-5) ME-SFI (N3/10) Electronic Transmission Control (N15/3) Upper Control Panel (N72/1) Steering Column Module (N80) CAN(s) used: CAN B & CAN C Mils: No Warning messages in Cluster? Yes DTC capable? Yes Control unit adaptation? Yes Requires control unit adaptation in: EIS, ME-SFI, ICM, CGW 31

133 Acronyms used in this Presentation CAN CGW DAS DTR ESP ETC ICM ME-SFI SBC SCM UCP Controller Area Network Central Gateway Diagnostic Assistance System Distance Tracking Radar Electronic Stability Program Electronic Transmission Control Instrument Cluster module Motor Electronics-Sequential Fuel Injection Sensotronic Brake Control Steering Column Module Upper Control Panel 32

134 Appendix W211 self-study material MBUSA Technical Training website: > Information Access Job numbers below concern R230 (W211-specific info unavailable at this time) GF30.30-P-0999Z Distronic (DTR) function description contents AR30.30-P-1000R Inspect/adjust setting of sensors of Distronic (DTR) 33

135 Flexible Service System Plus (FSS PLUS) 219 HO FSS Plus (WFF)

136 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2001 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

137 Objectives Upon completion of this section, you will be able to: Explain the differences between FSS and FSS PLUS Identify new system components Explain the brake wear calculation Identify two methods for retrieving maintenance information 3

138 Purpose of FSS (1st Generation) Reduce operating and maintenance costs Less frequent services with no loss of performance or dependability Uses distance and time related variables to determine maintenance intervals (A & B services) Automatic notification of need for service 4

139 FSS PLUS Overview In addition to the existing FSS, FSS PLUS incorporates: Brake service intervals ( + indicator) An enhanced history memory Service codes A thru H A new control unit (Central Gateway) 5

140 FSS PLUS Component Overview Data communicated on: CAN B, CAN C, CAN D & CAN SBC 6

141 FSS PLUS Component Overview (Engine Related Data) The following inputs are sent to the engine control module (N3/10) Crankshaft position (L5) Oil level, quality and temperature (B40) Coolant temperature (B11/4) 7

142 FSS PLUS Component Overview (Wheel Speed Related Data) The following inputs are sent to the ESP control module (N47/5) L.F. wheel speed (L6/1) R.F. wheel speed (L6/2) L.R. wheel speed (L6/3) R.R. wheel speed (L6/4) 8

143 FSS PLUS Component Overview (Brake Related Data) A 50% sensor (S10/1) is hard wired to the left front SAM (N10/1) This sensor is used to calculate remaining brake pad life 9

144 Brake Wear Calculation Remaining brake pad life is calculated using: Mileage since front brake pads replaced 50% front left brake pad wear sensor input At 100% pad wear a warning is displayed. 10

145 Brake Pad Wear Sensors Sensors designed differently to avoid improper installation One sensor on each front wheel - left = 50 % (S10/1) - right = 100 % (S10/2) One sensor right rear wheel % (S10/4) All sensors hard wired to N10/1 11

146 FSS PLUS Component Overview (Information Transfer) The central gateway (N93) receives information from the following Engine control module (N3/10) ESP control module (N47/5) Left front SAM (N10/1) 12

147 Central Gateway (CGW) Uses the following to calculate service items and intervals Engine oil variables Brake wear calculation Service items (service sheet) History memory 13

148 FSS PLUS Component Overview (Service Codes Accessed) Service codes can be viewed in the instrument cluster and via SDS In the future, SDS/WIS can be used to generate and print a service sheet for the vehicle 14

149 FSS PLUS Displays (Customer) Customer display Codes A-H are displayed Accessed using the multi-function steering wheel (as before) 15

150 Interpreting Service Codes Determined by the maintenance calculation Each service code has a corresponding estimated time + next to a service code indicates need for brake service (inspection) - i.e. D+ 7 hours 6 hours 8 hours 1 hour Servicecode 5 hours A B 4 hours Note: Service codes are used for estimating time ONLY. They do NOT indicate the same service items for each code. Service items are determined by time and driving conditions. G H F E D C 2 hours 3 hours 16

151 Accessing Workshop Information Multi-Function Displays 1. Begin at the customer display screen 2. Press and hold the reset button for 5 seconds 3. Use the multi-function steering wheel for scrolling 17

152 Service Menu Screen Initial screen that appears when accessing FSS PLUS Scroll up and down using the and buttons Select menu using button 18

153 Service Data Screen 58M21 used in the future for generating a service sheet via SDS/WIS Weighting time it will take to perform the service items - displayed in minutes Miles/days remaining - same as before 19

154 Items Screen Required service items Refer to service sheet for detailed break-down or indicator in the display indicates additional items - use / buttons for scrolling 20

155 Confirmation Screen Confirms service performed in central gateway (N93) All service items listed can be confirmed and cancelled Individual service items can be cancelled Scroll up and down using the and buttons Select option using button Key must be in position 2 in order to confirm service 21

156 Special Work Screen Allows you to manually set a date for: - exhaust gas analysis - general inspection Scroll up and down using the and buttons Change month and year using the and buttons 22

157 Used for measuring pad thickness (E320 only) Service Tip (Brake Pad Wear Gauge) Also a tire tread depth gauge Rear caliper (right) Front caliper (right) 23

158 Using the Tool Move the slide (2) against the driver (3) Insert the gauge pin (4) in the inspection hole Move the gauge against pad carrier Read the pad thickness 24

159 Service Notes For CGW (N93) replacement store information in SDS/DAS then download into new CGW If CGW is damaged, information can be uploaded into new CGW manually 25

160 Semi-Active Air Suspension (SAS) 219 HO SAS (ACB-ICC) Std E500 (optional E320) 1

161 These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair. Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC Printed in U. S.A. 2

162 SAS Advantages Improved driving safety and ride comfort due to: - Suspension ride height adaptation to vehicle load - Suspension dampening adaptation to road and driving style - Lower center of gravity (speed dependent) - Less aerodynamic drag (improved MPG) - Less up force on the front axle (anti-squat at rear axle) Driver control of: - Vehicle level - Dampening Driver information: - Vehicle raised function indicator lamps in switch - Sport dampening function indicator lamps in switch - Multi-function display of warning messages 3

163 SAS Function SAS Dual Control System - Air suspension leveling - Air suspension dampening ADS II - Hydraulic dampening 4

164 Front Air Spring / Strut 5

165 Front Air Spring Construction 40 Front air spring / strut Y51/1 LF spring strut valve unit y1 Additional volume valve Y51/1y2 Y51/1y1 p p i l y2 Level valve Additional volume air chamber Stop buffer Air chamber I h e h n v Y51 Piston rod Air bellows Protective boot Shock absorber LF front axle dampening valve 6

166 Level and Height Adjustment (y2) y2 Air Out Solenoid (y2) energized (open) for ride height changes y2 Air In Lower Note: Closing y2 acts as the check valve. This will maintain air volume in spring / strut assembly. Raise 7

167 Air Spring Dampening (y1) y1 Solenoid (y1) closed (energized) one air chamber used, less air volume to compress = firmer y1 Solenoid (y1) open (de-energized) both air chambers used, more air volume to compress = softer 8

168 Rear Air Spring / Strut 41 - Rear air spring / strut 5 - Rear dampening shock Y53 - Rear ADS dampening valve 9

169 Rear Air Spring / Strut Construction Y53/1 y2 y1 q p h f 41 - Rear air spring / strut h - Air bellows f - Air chamber p - Additional volume air chamber 41 q - Connecting hose Y53/1 - LR spring strut valve unit y1 - additional volume valve y2 - level valve 10

170 SAS Pneumatic / Hydraulic Components A9/1 - SAS compressor unit 42 - SAS central reservoir 40 - Front air spring strut Y51, 52, 53, 54 - ADS dampening valves 41 - Rear air spring strut 5 - Rear shock absorber 41p - Rear air spring additional volume reservoir 11

171 SAS Compressor Unit (A9/1) Location: Left front wheel housing 12

172 Central Reservoir Charge Valve (Y36/6) Y36/6 - Central reservoir charge valve B7 - Central pressure sensor Y36/6 B7 Location: Under left front headlamp 13

173 SAS Function Diagram 14

174 SAS Function Diagram / Legend A9/1 SAS compressor unit - m1 compressor motor - y1 compressor fill / vent valve - b pressure relief valve (~21 bar) - c drier - a filter Y36/6 Central reservoir solenoid valve - b7 SAS pressure sensor 40 Front air spring strut - Y51/1y1, Y52/1y1 air dampening solenoid - Y51/1y2, Y52/1y2 level solenoid 41 Rear air spring strut - Y53/1y1, Y54/1y1 air dampening solenoid - Y53/1y2, Y54/1y2 level solenoid 41p Rear air spring additional volume reservoir 42 SAS central reservoir 15

175 SAS Electrical Components 16

176 Electrical Components / Legend A1p13 - IC multifunction display A9/1 - SAS compressor unit B7 - SAS pressure sensor B22/3 - Rear level sensor B22/8 - LF axle level sensor B22/9 - RF axle level sensor B24/3 - LF body acceleration sensor B24/4 - RF body acceleration sensor B24/6 - Rear body acceleration sensor N49 - Steering angle sensor N51 - SAS control module N72s18 - Level adjustment switch N72s25 - Comfort / sport switch Y51 - LF ADS dampening valve Y51/1 - LF SAS valves Y52 - RF ADS dampening valve Y52/1 - RF SAS valves Y53 - LR ADS dampening valve Y53/1 - LR SAS valves Y54 - RR ADS dampening valves Y54/1 - RR SAS valves 17

177 SAS Control Module (N51) N51 Location: Passenger footwell 18

178 SAS Wake-Up Function Wake-up causes SAS module (N51) to monitor vehicle ride height and adjust as needed dependent on vehicle load changes. Wake-up occurs with any one of the following inputs: EIS key activation Any door activation Trunk lid activation Park brake activation Stop lamp switch activation 19

179 Vehicle Level Notes Wake-up Function - if level is >30mm lower than normal (0mm +/-10) it will raise to normal level (if reservoir pressure >11 bar) - if level is >65mm lower than normal, it will be raised even with a reservoir pressure of <11 bar by the compressor (prerequisite battery voltage >12.5v) to -63mm (critical level) - if level is >10mm higher than normal, it will be lowered to normal Normal Function (engine running) - level will be corrected if level deviates >10mm after opening a door or trunk - while driving, the vehicle level will adjust if deviation >20mm - while driving, every 15 minutes the level is adjusted to within +/- 10mm of normal ride height Locking Function - if wheels are unloaded when vehicle stationary, strut valves remain closed 20

180 Front Level Sensors (B22/8,9) Each sensor contains: 2 Hall effect sensors Redundant signal Location: Front upper control arm 21

181 Rear Level Sensor (B22/3) Location: Rear stabilizer bar 22

182 Body Acceleration Sensors (B24/3,4,6) B24/6 Location: inside RR wheel housing Measures vertical oscillations of the chassis Translates mechanical movements into voltage signals Influences ADS II dampening functions 23

183 Level Adjustment Switch (N72s18) Raises the vehicle above normal level Wired to LCP (N72) Input to SAS (N51) via CAN B N72 controls LED activation 24

184 Level Adjustment Parameters b c A - Normal ride height up to 68 mph, then lowers (b) to -15mm d - vehicle height will rise to normal height at 37 mph C - Raised ride height (+20mm). a - lowers to -15mm if vehicle speed between 50 and 74 mph for 5 minutes c - lowers to -15mm if vehicle speed greater than 74 mph Note: Raised height cancelled once vehicle lowered. 25

185 ADS II In addition to the two stages of dampening (air volume) that the SAS air suspension system provides, the ADS II system adds another four stages of dampening (hydraulically). Under normal driving conditions the SAS control module will control the dampening stages automatically based on sensor inputs. Driver can manually choose different stages by pressing the Comfort / Sport switch (N72s25) next to the gear shifter. 26

186 ADS II Comfort / Sport Switch (N72s25) LED s off, comfort setting Sport setting #1-1 LED illuminated - SAS reduced air dampening volume (firmer) - ADS II dampening controlled automatically Sport setting #2-2 LED s illuminated - SAS reduced air dampening volume (firmer) - ADS II, stage 3 or 4 dampening, as required Wired to LCP (N72) Input to SAS (N51) via CAN B LCP (N72) controls LED activation 27

187 ADS II Shock Absorber Movement Oil flow 28

188 211 SAS vs. 220 AIRmatic Suspension 211 SAS 220 AIRmatic 1. Front air springs w/ integrated dual air chamber and ADS II shock absorber with dampening valves 2. Rear air springs with remote mounted additional air chamber 3. Separate rear shock absorber w/ integrated ADS II dampening valves 4. National version coding stored in CGW (N93) 5. Re-designed solenoid valve block (Y36/6) with 1 valve 6. Pressure reservoir (located on right side trunk) 7. 2 stage Comfort / Sport switch 1. Front air springs w/single air chamber and ADS II shock absorber with dampening valve 2. Rear air springs w/single air chamber 3. Shock absorbers are integrated in rear air springs w/ads II dampening valves 4. National version coding stored in EIS (N73) 5. Solenoid valve block (Y36/6) with 5 valves 6. Pressure reservoir (located at left front wheel housing under headlamp) 7. 1 or 2 stage Comfort / Sport switch. (depending on model year) 29

189 Towing Blocks P