Overhead control panel control unit, component description - GF82.20-P-5216CE

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 with 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 overhead control panel control unit is located in the front section of the headliner.

Task

The overhead control panel control unit has the following tasks:

Reading in of sensors, pickups and signals
Evaluation of input factors
Actuation of components

Reading in of sensors, pickups and signals

The input factors are read in with the following connections:

Direct line
Wiper/inside rearview mirror LIN (LIN 2)
Interior CAN (CAN B)

Direct line

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

Hall sensor 1, tilting/sliding roof (M12b1)
Hall sensor 2, tilting/sliding roof (M12b2)
Interior temperature sensor
Tilting/sliding roof switch
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

Wiper/inside rearview mirror LIN

The signals from the following sensors are read in 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)
Garage door opener (A67n2) (with code (232) Garage door opener with frequency 284-390 MHz)
Light sensor (B38/1) (without code (345) Rain sensor)
Rain/light sensor (B38/2) (with code (345) Rain sensor)

Interior CAN

The signals are read in by the overhead control panel control unit via the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors are evaluated by the microprocessor and the corresponding components are actuated.

Actuation of components

Components are actuated with the following line:

Direct line

Direct line

The following components are actuated via a direct line:

Left reading lamp (A67e1)
Right reading lamp (A67e2)
Left front interior lamp
Right front interior lamp
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)

The housing of the overhead control panel control unit also contains the following components:

On vehicles with code (882) Interior monitoring (with ATA only):
- Interior protection and tow-away protection control unit (N26/6)
- Interior protection receiver (N26/6a1)
- Left interior protection transmitter (N26/6b1)
- Right interior protection transmitter (N26/6b2)
On vehicles with code (359) TELE AID emergency call system:
- Emergency call system operating and display elements
On vehicles with code (810) Sound system:
- Sound system microphone (B25/6)

Wiring diagram for overhead control panel (OCP) control unit

PE54.21-P-2107-99FAA