Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Overhead control panel control unit, task - GF82.20-P-4101-02A
2006 Mercedes Benz C350 4MaticSECTION Overhead control panel control unit, task - GF82.20-P-4101-02A
The overhead control panel (OCP) control unit (N70) has the following tasks:
Gateway for following components to Controller Area Network bus Class B (interior) (CAN B)
- Automatic light switch daylight sensor (B32/1) up to 31.5.03
- In-car temperature sensor (N70b1) up to 31.5.02 and as from 1.6.05
- Telephone transmitter/receiver and TELE AID, D2B (A35/17) (for code (855) TELE AID)
- Rain sensor (B38) up to 31.5.03 (for code (345) Rain sensor)
- Rain/light sensor (B38/2) as from 1.6.03 (for code (345) Rain sensor)
- Inside rearview mirror unit (A67) (for code (249) Automatically dimming inside rearview mirror and outside mirror (driver))
- Garage door opener transmitter unit (A67n2) (for code (231) Garage door opener (in diagnostic mode only))
- Left interior motion sensor transmitter and receiver (A26/4) (for model 203.7 and code (882) Interior monitoring (with ATA [EDW] only))
- Interior motion sensor transmitter and receiver (A26/14) (for models 203.0/2 and code (882) Interior monitoring (with ATA [EDW] only))
Voltage supply for following components
- In-car temperature sensor fan motor (N70m1) up to 31.5.02 and as from 1.6.05
- Rear dome lamp (E15/3) (for models 203.0/2 without code (220) Parktronic system (PTS))
- PTS warning display, rear dome lamp (A44/3) (for models 203.0/2 and code (220) Parktronic system (PTS))
- Inside rearview mirror unit (A67) (for code (249) Automatically dimming inside rearview mirror and outside mirror (driver))
- Garage door opener transmitter unit (A67n2) (for code (231) Garage door opener)
- Telephone transmitter/receiver and TELE AID, D2B (A35/17) (for code (855) TELE AID)
- Left vanity mirror illumination (E14/1) and right vanity mirror illumination (E14/2) (for code (543) Sun visors with illuminated mirror)
- Left interior motion sensor transmitter and receiver (A26/4) (for model 203.7 and code (882) Interior monitoring (with ATA [EDW] only))
- Interior motion sensor transmitter and receiver (A26/14) (for models 203.0/2 and code (882) Interior monitoring (with ATA [EDW] only))
- Roof system drive unit (M12) and roller sun blind drive unit (M12/5) (for model 203.7 and code (413) Panoramic sliding roof)
- Roof system drive unit (M12) (for models 203.0/2 and code (414) Power glass tilting/sliding roof)
Actuation of interior lights (IBL) and following components
- Surround lamp (A67e3)
- front dome lamp (N70e1)
- left front reading lamp (N70e2)
- right front reading lamp (N70e3)
- Rear dome lamp (E15/3) (for model 203.7)
- Left reading lamp (E15/3e1), right reading lamp (E15/3e2) and dome lamp (E15/3e3) (for models 203.0/2 without code (220) Parktronic system (PTS))
- Reading lamp 1 (A44/3e1), reading lamp 2 (A44/3e2) and dome lamp (A44/3e3) (for models 203.0/2 and code (220) Parktronic system (PTS))
- Automatic dimming mirror (A67h3) (for code (249) Automatically dimming inside rearview mirror and outside mirror (driver))
- Roof system drive unit (M12) and roller sun blind drive unit (M12/5) (for model 203.7 and code (413) Panoramic sliding roof)
- Roof system drive unit (M12) (for models 203.0/2 and code (414) Power glass tilting/sliding roof)
Reading in of integrated switches:
- rear dome lamp switch (N70s2)
- Dome lamp switch (N70s3)
- Left front reading lamp switch (N70s6)
- Right front reading lamp switch (N70s7)
- Roof switch (N70s1) (for model 203.7 and code (413) Panoramic sliding roof or for code 203.0/2 and code (414) Power glass tilting/ sliding roof)
For
vehicles the overhead control panel control unit (N70) has an SOS push-button switch (S93/3) installed in it. Actuation is however carried out by the emergency call system control unit (N123/4).
Reading and evaluating sensors
- Automatic light switch daylight sensor (B32/1) up to 31.5.03
- In-car temperature sensor (N70b1) up to 31.5.02 and as from 1.6.05
- Rain sensor (B38) up to 31.5.03 (for code (345) Rain sensor)
- Rain/light sensor (B38/2) as from 1.6.03 (for code (345) Rain sensor)
- Automatic dimming interior rearview mirror sensor, forward (A67h1) and automatic dimming interior rearview mirror sensor, back (A67h2) (for code (249) Automatically dimming inside rearview mirror and outside mirror (driver))
- Hall sensor 1 (M12b1), Hall sensor 2 (M12b2), Roller sun blind Hall sensor 1 (M12/5b1) and Roller sun blind Hall sensor 2 (M12/5b2) (for model 203.7 and code (413) Panoramic sliding roof)
- Hall sensor 1 (M12b1) and Hall sensor 2 (M12b2) (for models 203.0/2 and code (414) Power glass tilting/sliding roof)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.