Overhead Control Panel Control Unit, Component Description - GF82.20-P-5216LF

Model 217, 222 

Model 217.3, 222, shown on model 222 up to 31.05.2018 with code 877 (Ambient lighting), code 413 (Panoramic sliding sunroof) and code 348 (Emergency call/Assist system) 

Courtesy of MERCEDES-BENZ USA

Model 217.3, 222, as of 01.06.2018 with code 351 (Emergency call system (HERMES)) 

Courtesy of MERCEDES-BENZ USA

Model 217.4, shown up to 31.05.2018 with code 351 (Emergency call system (HERMES)) 

Courtesy of MERCEDES-BENZ USA

Model 217.4 as of 01.06.2018 with code 351 (Emergency call system (HERMES)) 

Courtesy of MERCEDES-BENZ USA

Location 

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

The emergency call system button group (model 217.4 with code 351 (Emergency call system (HERMES))) is located between the overhead control panel control unit and the inside rearview mirror (A67) at the front on the roof lining.

Tasks 

The overhead control panel control unit actuates the interior lighting. In addition, the control elements for various functions are located on the overhead control panel control unit.

Model 217.3, 222 up to model year 2018 with code 882 (Interior monitoring)

The overhead control panel control unit has the purpose of accommodating the ATA [EDW]/tow-away protection/interior protection control unit (N26/6).

Model 217.3, 222 as of model year 2018 with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring)

The overhead control panel control unit monitors the vehicle interior by sending and receiving ultrasonic waves.

For this purpose, the following component parts are integrated into the overhead control panel control unit:

• Interior protection receiver (N70a1)
• Left interior protection transmitter (N70a2)
• Right interior protection transmitter (N70a3)

If the inclination sensor in the overhead control panel control unit senses an alarm-relevant inclination change, an alarm is output.

The overhead control panel control unit has the following tasks:

• Reading in of signals 
• Evaluation of input factors 
• Actuation of components 
• Transmitting signals 

Reading in of signals 

The overhead control panel control unit reads in the input factors through the following connections:

• Direct line 
• Roof LIN (LIN B13) (up to model year 2018) 
• Alarm system LIN (LIN B14) (with code 882 (Interior monitoring)) 
• Interior CAN (CAN B) (as of model year 2018) 

Direct line 

The overhead control panel control unit reads in the signals of the following components via direct lines:

• Interior protection receiver (model 217.3, 222 as of model year 2018 with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring))
• Interior temperature sensor with integrated fan (N70b1)
• Roof system switch (model 222 with code 413 (Panoramic sliding sunroof))
• Rear dome lamp button
• Interior lamp automatic function button
• Front dome lamp button
• Left front reading lamp button
• Right front reading lamp button
• Rear roller sunblind switch (model 222 with code 413 (Panoramic sliding sunroof))
• SOS button (model 217.3, 222, with code 347 (Mercedes-Benz emergency call system), code 348 (Emergency call/Assist system), code 350 (eCall Europe emergency call system) or code 351 (Emergency call system (HERMES)))
• Breakdown assistance button (model 217.3, 222, with code 347 (Mercedes-Benz emergency call system), code 348 (Emergency call/Assist system), code 350 (eCall Europe emergency call system) or code 351 (Emergency call system (HERMES)))
• MB-Info button (model 217.3, 222, with code 347 (Mercedes-Benz emergency call system), code 348 (Emergency call/Assist system), code 350 (eCall Europe emergency call system) or code 351 (Emergency call system (HERMES)))
• Mercedes me connect button (model 217.3, 222, as of 01.06.2018, with code 351 (Emergency call system (HERMES)))
• Emergency call system button group (model 217.4 with code 351 (Emergency call system (HERMES))):
  • MB-Info button (up to 31.05.2018)
  • SOS button
  • Breakdown assistance button (up to 31.05.2018)
  • Mercedes me connect button (as of 01.06.2018)
• Roof MAGIC SKY CONTROL switch (with code 398 (Panoramic roof with MAGIC SKY CONTROL))
• Left rear dome lamp button (E11/1s1) in the left rear dome lamp (E11/1) (model 222)
• Right rear dome lamp button (E11/2s1) in the right rear dome lamp (E11/2) (model 222)
• Left rear vanity mirror illumination switch (E15/10s1) in left rear vanity mirror unit (E15/10) (model 222)
• Right rear vanity mirror illumination switch (E15/11s1) in right rear vanity mirror unit (E15/11) (model 222)

Roof LIN (up to model year 2018) 

The overhead control panel control unit and the front SAM control unit (N10/6) communicate with one another via the roof LIN.

Alarm system LIN (with code 882 (Interior monitoring)) 

The overhead control panel control unit reads in the signals from the following component parts via the alarm system LIN:

• Left front door interior protection sensor (B44/1) (model 217.4 as of model year 2018)
• Right front door interior protection sensor (B44/2) (model 217.4 as of model year 2018)
• Left rear interior protection sensor (B44/3) (model 217.4 as of model year 2018)
• Right rear interior protection sensor (B44/4) (model 217.4 as of model year 2018)
• Alarm siren (H3/1)

Interior CAN (as of model year 2018) 

The signals read in by the overhead control panel control unit via the interior CAN include the following:

• Energy management status
• Terminal status of terminal 15
• Status of side window
• Terminal 58d
• Interior lighting request
• Request to activate alarm readiness (with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring))

Evaluation of input factors 

The input factors are evaluated by the microprocessor of the overhead control panel control unit and the corresponding components are actuated.

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• Alarm system LIN (with code 882 (Interior monitoring)) 

Direct line 

The overhead control panel control unit actuates the following components via direct lines:

• Left reading lamp (A67e1)
• Right reading lamp (A67e2)
• Ambient lamp (A67e3)
• Left rear dome lamp (model 222)
  • Left rear reading lamp (E11/1e1)
  • Left rear interior lamp (E11/1e2)
• Right rear dome lamp (model 222)
  • Right rear reading lamp (E11/2e1)
  • Right rear interior lamp (E11/2e2)
• 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) (model 217)
• Left rear vanity mirror unit (model 222)
  • Left rear vanity mirror illumination (E15/10e1)
  • Left rear vanity mirror dome lamp (E15/10e2)
• Right rear vanity mirror unit (model 222)
  • Right rear vanity mirror illumination (E15/11e1)
  • Right rear vanity mirror dome lamp (E15/11e2)
• Rear ambient lamp (E15/36) (model 222 except code 877 (Ambient lighting) and except CODE (811) Advanced Sound System)
• Rear light ring ambient lighting (E15/37) (model 222 with code 223 (Electrically adjustable rear bench seat) and code 811 (Advanced Sound System))
• Rear ambient lighting (E15/38) (model 222 except code 223 (Electrically adjustable rear bench seat))
• Left interior protection transmitter (model 217.3, 222 as of model year 2018 with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring))
• Right interior protection transmitter (model 217.3, 222 as of model year 2018 with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring))
• Front dome lamp (model 217.3, 222)
• Left overhead control panel LED (model 217.3, 222 up to model year 2018 with code 877 (Ambient lighting), model 217.4)
• Right overhead control panel LED (model 217.3, 222 up to model year 2018 with code 877 (Ambient lighting), model 217.4)
• Eyeglasses box illumination (N70e8)
• Fan motor in interior temperature sensor with integrated fan

Alarm system LIN (with code 882 (Interior monitoring)) 

The overhead control panel control unit actuates the alarm siren via the alarm system LIN.

Transmitting signals 

The overhead control panel control unit sends different signals via the following connections:

• Roof LIN (up to model year 2018) 
• Interior CAN (as of model year 2018) 

Roof LIN (up to model year 2018) 

The signals sent by the overhead control panel control unit via the roof LIN to the front SAM control unit include the following:

• Status of interior lamp automatic function button
• Status of roof system switch (model 222 with code 413 (panoramic sliding sunroof))
• Status SOS button, breakdown assistance button, MB-Info button (model 217.3, 222 with code 347 (Mercedes-Benz emergency call system), code 348 (Emergency call/Assist system), code 350 (eCall Europe emergency call system) or code 351 (Emergency call system (HERMES)))
• Status of buttons on emergency call system button group (model 217.4 with code 351 (Emergency call system (HERMES)))

Interior CAN (as of model year 2018) 

The signals sent by the overhead control panel control unit via the interior CAN include the following:

• Status of interior lamp automatic function button
• Status of roof system switch (model 222 with code 413 (panoramic sliding sunroof))
• Status of interior lighting
• Status of anti-theft alarm system (with code 852 (Sensor system for anti-theft alarm system (ATA)) or code 882 (Interior monitoring))
• Status of SOS button, breakdown assistance button, MB-Info button (model 217.3, 222, up to 31.05.2018, with code 347 (Mercedes-Benz emergency call system), code 348 (Emergency call/Assist system), code 350 (eCall Europe emergency call system) or code 351 (Emergency call system (HERMES)))
• Status of SOS button, Mercedes me connect button (model 217.3, 222, as of 01.06.2018, with code 351 (Emergency call system (HERMES)))
• Status of buttons on emergency call system button group (model 217.4 with code 351 (Emergency call system (HERMES)))

	Wiring diagram for overhead control panel (OCP) control unit	Model 217.3 Model 222 up to model year 2018	PE54.21-P-2107-97SEA
		Model 217.4 up to model year 2018	PE54.21-P-2107-97SEB
		Model 217.3, 222 as of model year 2018	PE54.21-P-2107-97SEC
		Model 217.4 as of model year 2018	PE54.21-P-2107-97SED