Overhead control panel electronics, component description - GF82.20-P-5217CE
MODEL 204 except CODE (414) Power glass tilting/sliding roof as of model year 2009/YoM 08
With code (359) TELEAID emergency call system or code (348) Emergency call/Assist system
Location
The overhead control panel electronics is located at the front on the headliner.
Task
The controls of the following systems are located on the overhead control panel electronics.
- Interior illumination
- Panoramic glass sunroof (with code ((413) Panoramic glass sunroof with top sliding sunroof)
- Infrared interior monitoring and tow-away protection (with code (882) Interior monitoring (for ATA only))
- Emergency call system (with code (359) TELEAID emergency call system or code (348) Emergency call/Assist system)
The node of the wiper/inside rearview mirror-LIN (LIN 2) is integrated into the overhead control panel electronics. The following components are connected to the node:
- Inside rearview mirror (A67) (with code (232) Garage door opener with frequency 284-390 MHz, code (249) Automatic dimming inside rearview mirror and outside mirror including folding outside mirror or with code (249) Automatic dimming inside rearview mirror and outside mirror (driver)
- Light sensor (B38/1) (without code (345) Rain sensor)
- Rain/light sensor (B38/2) (with code (345) Rain sensor)
- Front SAM control unit with fuse and relay module (N10/1)
The overhead control panel electronics are supplied with voltage by the front SAM control unit.
The following components are supplied with voltage by the overhead control panel electronics:
- Light sensor (without code (345) Rain sensor)
- Rain/light sensor (with code (345) Rain 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)
The housing of the overhead control panel electronics also contains the following components:
- With code (882) Interior monitoring (with ATA [EDW] 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)
- With code (359) TELEAID emergency call system or code (348) Emergency call/Assist system
- Emergency call system button
- MB Info button
- Breakdown assistance button
In vehicles with code (359) TELEAID emergency call system or code (348) Emergency call/Assist system the emergency call system control unit (N123/4) directly reads in the control signal for the buttons (emergency call system, MB Info, breakdown assistance) and evaluates them.
The LEDs (function, status feedback) integrated into the buttons (emergency call system, MB Info, breakdown assistance) are actuated by the emergency call system control unit.
The buttons (emergency call system, MB Info, breakdown assistance) are all equipped with a contact resistor (connected in parallel to switch contact). In the rest position these have a voltage applied to them. The voltage difference between the input and output side of the contact resistor is used by the emergency call system control unit to check the feed lines and ground lines.
When a button (emergency call system, MB Info, breakdown assistance) is pressed, each contact resistor is bridged by the respective switch contact. The control signals for the buttons (emergency call system, MB Info, breakdown assistance) are read in by the emergency call system control unit over 2 direct lines. When a button (emergency call system, MB Info, breakdown assistance) is operated, the emergency call system control unit implements the respective request and then actuates each LED intermittently (visual feedback). In the event of a fault in the emergency call system both red LEDs are permanently actuated.
| Wiring diagram for overhead control panel (OCP) control unit | PE54.21-P-2107-97FAB |