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KEYLESS-GO, function - GF80.61-P-0005LE

MODEL 216.3, 221.0 /1 with CODE (889) KEYLESS-GO as of model year 2009 /YoM 08 

KEYLESS-GO (KG), general 

The KEYLESS-GO system allows access to the vehicle and starting the vehicle engine without using the transmitter key (A8/1). It is sufficient to just carry the transmitter key

IMPORTANT Operation of the central locking (CL) via the transmitter key remains possible parallel to the KEYLESS-GO functions.

The anti-theft alarm system (ATA) (with code (551) Anti-theft alarm system (ATA)) functions in the same manner as when locking/unlocking the CL with the transmitter key.

The KEYLESS-GO system comprises the following partial functions:

The following partial functions are described in separated documents:

Function sequence for position determination of transmitter key (on model 216) 

A position determination of the transmitter key is required for the individual functions. When the

are activated by the KEYLESS-GO system, the transmitter key can determine the area (A, B, C, D or E) in which it is located.

Fig 1: Identifying Transmitter Key Function Positions
G07509771Courtesy of MERCEDES-BENZ USA

Function sequence for position determination of transmitter key (on model 221) 

A position determination of the transmitter key is required for the individual functions. When the

are activated by the KEYLESS-GO system, the transmitter key can determine the area (A, B, C, D or E) in which it is located.

Fig 2: Identifying Transmitter Key Function Positions
G07509772Courtesy of MERCEDES-BENZ USA

The determined position is transmitted by the transmitter key via radio signal. The rear window antenna amplifier module (A2/12) edits the signal and relays it to the KEYLESS-GO control unit (N69/5).

  KEYLESS-GO, location of components Model 216 GF80.61-P-0005-01LA
Model 221 GF80.61-P-0005-01LE 
  KEYLESS-GO, block diagram   GF80.61-P-0005-02LE 
  Locking/unlocking, function   GF80.61-P-2008LE 
  Engine start/stop, function   GF80.61-P-3012LE