Component Description For Keyless-Go Control Unit - GF80.61-P-4204RD

Model 172.4 with code 889 (KEYLESS-GO)

Location

The KEYLESS-GO control unit behind the left paneling in the trunk.

Shown on model 172.4

Fig 1: Keyless-Go Control Unit Components Location - Model 172.4 With Code 889

Courtesy of MERCEDES-BENZ USA

Tasks

The KEYLESS-GO control unit has the following purposes:

Reading in of sensors

The input factors are read in via the following connections:

Direct line

The signals from the following components are read via a direct line:

Left KEYLESS-GO door handle (A17/1)
Right KEYLESS-GO door handle (A17/2)
Windshield antenna (A2/118) via FM, AM and CL antenna amplifier (A2/18) as of 01.06.2015 or rear KEYLESS-GO antenna (A97) up to 31.05.2015

Interior CAN

The signals are read in by the KEYLESS-GO control unit via the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

The following components are actuated via a direct line:

	Wiring diagram for KEYLESS-GO control unit	Model 172.4 as of model year 2017 with code 889 (KEYLESS-GO)	PE80.61-P-2101-97TAB
		Model 172.4 up to model year 2017 with code 889 (KEYLESS-GO)	PE80.61-P-2101-97TAA