Component description for overhead control panel control unit - GF82.20-P-5216G

MODEL 463.306 /336 /346 as of model year 2011 /YoM 10

MODEL 463.202 /222 /236 /237 as of model year 2009 /YoM 08

MODEL 463.247 /248 /249 /254 up to 31.8.08 as of model year 2007

MODEL 463.270 /271 /303 /340 /341 as of model year 2007

Shown on vehicle with code (ZU8) USA version

Fig 1: Locating Overhead Control Panel Control Unit

Courtesy of MERCEDES-BENZ USA

Location

The overhead control panel control unit is located in the front section on the dome.

Task

The overhead control panel control unit has the following tasks:

Reading in of sensors, pickups and signals

The input factors are read in via the following connections:

Direct line

The following components and signals are read in by the overhead control panel control unit via a direct line:

Interior air temperature sensor
Tilting/sliding roof switch (model 463.222/340 and model 463.236/237/341 with code (D27) Electric tilting/sliding roof)
Tilting/sliding roof (M12/1) (model 463.222/340 and model 463.236/237/341/346 with code (D27) Electric tilting/sliding roof)
Rear dome lamp switch
Dome lamp switch
Left front reading lamp switch
Right front reading lamp switch
SOS pushbutton switch
Interior protection transmitter and receiver (A26/5) (with code (FZ8) Anti-theft alarm system with interior protection)
Inside rearview mirror unit (A67)
Rain sensor (B38) and light activation sensor (B32/1)
Circuit 30
Circuit 31

Moreover, the following switches are read in via a direct line in model 463.202/303:

Soft top operation switch (instead of tilting/sliding roof switch)
Left rear soft top locked switch (S84/1)
Right rear soft top locked switch (S84/2)
Left front soft top unlocked switch (S84/3)
Right front soft top unlocked switch (S84/4)

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).

Evaluating input factors

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

Control of systems

The overhead control panel control unit actuates the following systems:

Interior illumination (IBL)
Tilting/sliding roof (in model 463.222/340 and model 463.236/237/341/346 with code (D27) Electric tilting/sliding roof)
Dimming of inside rearview mirror and outside mirror on driver side
Soft top (in model 463.202/303)

Voltage supply to components

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

Actuation of components

The components are actuated via direct lines.

The overhead control panel controls the following integrated components directly:

Moreover, the following components are actuated via a direct line:

Left rear reading lamp
Right rear reading lamp
Left sun visor with illuminated mirror
Right sun visor with illuminated mirror
Inside rearview mirror unit (dimming)
Electric power soft top motor (in model 463.202/303)
Tilting/sliding roof (in model 463.222/340 and model 463.236/237/341/346 with code (D27) Electric tilting/sliding roof)

Looping through signals and information

The read-in signals of the following components are provided via interior CAN to other control units: