Keyless Go - W211

219 HO KG (GC,RP) 08-16-02

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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

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 Appendix3

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 inside4

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

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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

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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 drivers will cause global unlocking Summer opening is only possible using infrared signal from remote control key7

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

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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 driving9

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

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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

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Operation Overview(Example: Unlock request at drivers door)1. With key present, switch on inside of drivers 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

Operation Overview (cont.)(Example: Unlock request at drivers 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 up13

Operation Overview (cont.)(Example: Unlock request at drivers 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 module14

Operation Overview (cont.)(Example: Unlock request at drivers 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 drivers door when handle is pulled15

KG Components in Detail

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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

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Components on the KG CANRear KG module Interior compartment module

KG CAN

EIS

Left rear door KG module

Right rear door KG module

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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 motor19

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

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5

4

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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)

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Left and Right Rear Door KG Control Modules (N69/8 & N69/9) 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

Antenna A2/39

Antenna A2/4122

KG Door Opening Assist Motors 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

R

KG CAN

L

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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

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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) Functions as a locking request when pressed

S88/6 provides signal to rear SAM to ignore any request to open trunk

Rear KG module informs EIS via KG CAN

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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 > EIS26

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 engine27

Interior Compartment Module with Antenna

Integrated antenna confirms that key is inside vehicle while driving

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Rear Door KG Control Module Antennas

Antenna A2/39

Each rear door KG control module has an associated antenna Antenna output controlled by a KG CAN signal from EIS

Antenna A2/4129

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 module30

Rear Bumper Antenna (A2/31)

Beneath rear bumper Discrete wire to rear KG module (N102) Output controlled by rear KG module

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Requesting Locking & UnlockingKG CAN Door handle switches Rear door KG modules

Trunk switches

Rear KG module EIS

CAN B Rear SAM32

Requesting Engine Start

Park CAN C Electronic Selector Module EIS SBC hydraulic unit Brake switch Rear SAM33

CAN B

Waking-up the Remote Control KeyRear bumper antenna Trunk KG antenna

Dotted line = RF signal Rear KG module Rear door KG modules Interior compartment module

EIS

KG CAN

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Remote Control Key RepliesRight antenna amplifier module

Rear window antenna

KG CAN Rear KG module EIS35

When Locking or Unlocking is Authorized:CAN B Command to lock, unlock or operate remote trunk release

KG CAN (When unlocking) Rear door KG control module

KG Door Opening Assist Motor36

Engine Start Authorization

Electronic Steering Lock

CAN C EIS

ME-SFI control module

Note: Engine shut-off request does not require EIS to authorize the remote control key

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KG Locking / Unlocking Notes In selective unlocking mode: if any door handle except the drivers 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 30-40 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

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W211 Keyless Go (KG)Group: Control unit designation: U.S. Introduction: Major components: 80.61 N73 MY2003 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 B, CAN C, KG CAN no Yes Yes Assign transmitter card to key track ICM39

CAN(s) used Mils: Warning messages in ICM? DTC capable? Control unit adaptation? Requires control unit adaptation in:

Acronyms Used in This PresentationCAN 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

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Appendix MBUSA Technical Training website: http://www.mbusatechtraining.com/home.asp > Information Access Http://www.Marquardt.De/englisch/haupt_frame.Html (The maker of the R209 / W211 KG system) WIS group 80.61 for the particular model Unlocking function: GF80.61-P-2009T (W211) Locking function: GF80.61-P-2010T (W211) NETSTAR information W211 Self-Study material

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