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

MODEL 212 with CODE 414 (Power glass tilting/sliding roof)

Shown with CODE 359 (TELEAID emergency call system)

Fig 1: Overhead Control Panel Control Unit Components - Model 212

Courtesy of MERCEDES-BENZ USA

The emergency call system button is covered up by a protective cover. Pressing the cover unlocks it, and it automatically opens with the aid of a spring mechanism. The emergency call system button is designed as a normally closed contact.

Location

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

Task

The wiper/inside rearview mirror-LIN (LIN 2) node is integrated into the overhead control panel control unit. The following components are connected to this node:

With CODE 249 (Automatic dimming inside and outside rearview mirrors) and CODE 494 (USA version) or with CODE 249 (Automatic dimming inside and outside rearview mirrors) including folding outside mirror and without CODE 494 (USA version):
- Forward mirror dimming light sensor (A67h1)
- Rearward dimming mirror light sensor (A67h2)
- Mirror dimming (A67h3)
Garage door opener (A67n2) (with CODE 231 (Garage door opener) or CODE 232 (Garage door opener with frequency 284-390 MHz))
Rain/light sensor (B38/2)
Front SAM control unit with fuse and relay module (N10/1)

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

With CODE 882 (Interior monitoring (only with ATA [EDW])):
- 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) or CODE 350 (Ecall Europe emergency call system, gen. 2):
- Emergency call system button
- MB-Info button (with CODE 359 (TELEAID emergency call system) or CODE 348 (Emergency call/assist system))
- Breakdown assistance button (with CODE 359 (TELEAID emergency call system) or CODE 348 (Emergency call/assist system))

The overhead control panel control unit has the following tasks:

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

Reading in of sensors and signals

The input factors are read in via the following connections:

Direct line
Interior CAN (CAN B)

Direct line

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

Hall sensor 1, tilting/sliding roof (M12b1)
Hall sensor 2, tilting/sliding roof (M12b2)
Interior temperature sensor with integrated fan (N70b1)
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 button (N70s8) (with CODE 882 (Interior monitoring (only with ATA [EDW])))
Tow-away protection button (N70s9) (with CODE 882 (Interior monitoring (only with ATA [EDW])))

Interior CAN

The signals are read in by the overhead control panel control unit via the interior CAN. The functions that use these signals are described in the individual 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 connection:

Direct line

Direct line

The following components are actuated via direct lines:

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)

Wiring diagram for overhead control panel (OCP) control unit

PE54.21-P-2107-97DAA