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

Model 205

as of model year 2019

Model 253 (except 253.99)

as of model year 2020

Model 253.99

Shown: Model 205.0

Courtesy of MERCEDES-BENZ USA

Shown on model 253

Fig 1: Keyless-Go Control Unit Component Location - Model 253 As Of Model Year 2020

Courtesy of MERCEDES-BENZ USA

Location

The KEYLESS-GO control unit is located on the right in the trunk under the cover (model 205) and/or on the left in the trunk behind the side trim (model 253).

Tasks

The KEYLESS-GO control unit has the following purposes:

Reading in of sensors
Evaluation of input factors
Actuation of components

Reading in of sensors

The input factors are read in via the following connections:

Direct line
KEYLESS-GO LIN (LIN B27) (with CODE 871 (HANDS-FREE ACCESS))
Interior CAN (CAN B)

Direct line

The signals from the following components are read via direct lines:

FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier (A2/18)
Left front KEYLESS-GO door handle (A17/1) (with CODE 889 (KEYLESS-GO))
Right front KEYLESS-GO door handle (A17/2) (with CODE 889 (KEYLESS-GO))
Left rear KEYLESS-GO door handle (A17/3) (model 205.0/1/2, Model 253 with CODE 889 (KEYLESS-GO))
Right rear KEYLESS-GO door handle (A17/4) (model 205.0/1/2, Model 253 with CODE 889 (KEYLESS-GO))

KEYLESS-GO LIN (with CODE 871 (HANDS-FREE ACCESS))

The signals from the rear switching module (N38) are read in by the KEYLESS-GO LIN.

Interior CAN

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

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 direct lines:

FM 1, AM, CL [ZV] and KEYLESS GO antenna amplifier
Trunk KEYLESS-GO antenna (A2/35)
Left rear door KEYLESS-GO antenna (A2/39) (model 205.0/1/2, Model 253 with CODE 889 (KEYLESS-GO))
Right rear door KEYLESS-GO antenna (A2/41) (model 205.0/1/2, Model 253 with CODE 889 (KEYLESS-GO))
Left front door KEYLESS-GO antenna (A2/38) (model 205.3/4 with CODE 889 (KEYLESS-GO))
Right front door KEYLESS-GO antenna (A2/40) (model 205.3/4 with CODE 889 (KEYLESS-GO))
Center console KEYLESS-GO antenna (A2/60)
Wake-up line to electronic ignition lock control unit (N73)

	Wiring diagram for KEYLESS-GO control unit	Model 253 (except 253.99) as of model year 2020; model 253.99	PE80.61-P-2101-97FCA
		Model 205 as of model year 2019 Control unit N69/5	PE80.61-P-2101-97FBB