Component description for electronic overhead control panel - GF82.20-P-5217CE

WARNING: This page is about a different car, the 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 204 except CODE (414) Power glass tilting/sliding roof as of model year 2009/YoM 08

Fig 1: Identifying Overhead Control Panel Control Unit Components

Courtesy of MERCEDES-BENZ USA

Location

The electronic overhead control panel is located in the front section of the headliner.

Task

The controls on the electronic overhead control panel are used for manual interior lights control.

The electronic overhead control panel is supplied with voltage by the front SAM control unit with fuse and relay module (N10/1). The electronic overhead control panel is a subscriber of the wiper/ inside rearview mirror LIN (LIN 2).

The signals from the following components are provided via the wiper/inside rearview mirror LIN:

On vehicles with code (249) Automatic dimming inside and outside rearview mirrors including folding outside mirror without code (494) USA version or code (249) Automatic dimming inside rearview mirror and outside mirror (driver) and code (494) USA version:
- Forward automatic mirror dimming light sensor (A67h1)
- Rearward automatic mirror dimming light sensor (A67h2)
- Mirror dimming (A67h3)
Light sensor (B38/1) (without code (345) Rain sensor)
Rain/light sensor (B38/2) (with code (345) Rain sensor)

The following components are supplied with voltage by the overhead control panel electronics:

Light sensor
Rain/light sensor
Left sun visor mirror lamp (E14/1) via the left front mirror lamp switch (S101)
Right sun visor mirror lamp (E14/2) via the right front mirror lamp switch (S102)
Rear dome lamp (E15/3)

Design

The following components are located on the overhead control panel electronics:

Interior temperature sensor
Left front interior lamp
Right front interior lamp
Panoramic sliding roof control switch (with code (413) Panoramic glass sunroof with top sliding sunroof)
Rear dome lamp switch
Interior lamp automatic function switch
Front dome lamp switch
Left front reading lamp switch
Right front reading lamp switch
Interior protection switch
Towing sensor button
Emergency call system control and display elements (with code (359) TELE AID emergency call system)

Wiring diagram for overhead control panel (OCP) control unit

PE54.21-P-2107-97FAB