Keyless Go, function - GF80.61-P-0005GM

MODEL 164.1 as of model year 2009 with CODE (889) Keyless Go/YoM 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009 with CODE (889) Keyless Go/YoM 08

Keyless Go, 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 have the transmitter key on your person.

Operation of the central locking (CL) via the transmitter key remains possible parallel to the Keyless Go functions.

The Keyless Go system comprises the following subfunctions:

Function sequence for position definition of transmitter key

Further subfunctions are described in the appropriate service information:

Locking/unlocking, function
Engine start-stop, function

Function sequence for position definition of transmitter key

A position determination of the transmitter key is required for the individual functions. For this purpose the following components are actuated directly via a direct line by the KEYLESS-GO control unit (N69/5):

KEYLESS-GO trunk antenna (A2/35) (model 164.8, 251.0/1 up to 31.7.10 and model 164.1)
Left rear door KEYLESS-GO antenna (A2/39),
Right rear door KEYLESS-GO antenna (A2/41),
KEYLESS GO cockpit antenna (A2/60) and
interior Keyless-Go antenna (A2/61)

The KEYLESS-GO control unit (N69/5) determines the position of the transmitter key via the KEYLESS-GO antennas. The determined position is transmitted by radio signal to the roof antenna module (A2/93). The roof antenna module edits the signal and relays it to the KEYLESS GO control unit.

In the illustrations below the transmission range for the KEYLESS-GO antennas is shown schematically in relation to the specific possible key positions (A, B, C, D or E).

Model 164.8, 251.0/1 up to 31.7.10 and model 164.1, shown on model 164.1

Fig 1: Overview Of Keyless Go Control Unit - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

Model 164.8 and 251.0/1 as of 1.8.10, shown on model 251.0

Fig 2: Overview Of Keyless Go Control Unit - Shown On Model 251.0

Courtesy of MERCEDES-BENZ USA

	Keyless Go, location of components		GF80.61-P-0005-01GM
	Keyless Go, block diagram		GF80.61-P-0005-02GM
	Locking/unlocking, function		GF80.61-P-2008GM
	Engine start/stop, function		GF80.61-P-3012GM