Switch, Controls And Symbol Illumination, Function - GF82.20-P-2102LF

Model 217, 222 

Courtesy of MERCEDES-BENZ USA

Search and symbol lighting, up to model year 2018 

Courtesy of MERCEDES-BENZ USA

Search and symbol lighting, as of model year 2018 

Model 217.3

The rear dome lamp and the rear dome lamp ambient lighting are installed, but do not receive signal "circuit 58d".

Function requirements, general 

• No overvoltage or undervoltage

Search and symbol illumination 

The search and symbol lighting illuminates all control elements as well as the lighting of the vehicle interior. The brightness of the search and symbol lighting can be adjusted manually.

The search and symbol lighting helps the driver to find important control elements and to look for objects in the vehicle without having to switch on the ignition or the exterior lighting.

The search and symbol illumination is switched on by unlocking the vehicle remotely, by opening a vehicle door or by changing the status of circuit 15. The luminosity of the search and symbol lighting can be continuously adjusted using the instrument lighting brightness control in the center instrument panel button group (up to model year 2018) or in the exterior lighting switch (as of model year 2018). The front SAM control unit reads in the signals of the instrument lighting brightness control via the instrument panel LIN (up to model year 2018) or directly (as of model year 2018) and sends them via the interior CAN, electronic ignition lock control unit and the user interface CAN to the instrument cluster.

After unlocking the vehicle or opening a vehicle door, the search and symbol illumination is switched on with 100 % luminosity.

The electronic ignition lock control unit sends the status of the central locking system and the status of circuit 15 over the user interface CAN to the instrument cluster.

The front door control units send the status of the front doors (open or closed) via the interior CAN, electronic ignition lock control unit and user interface CAN to the instrument cluster.

The rear door control units (model 222) send the status of the rear doors (open or closed) via the interior CAN, electronic ignition lock control unit and the user interface CAN to the instrument cluster.

The instrument cluster evaluates all incoming information, generates the circuit 58d signal and transmits it via the user interface CAN to the following control units to activate the search and symbol illumination:

• COMAND controller unit (up to model year 2018) or head unit (as of model year 2018)
• Electronic ignition switch control unit

The instrument cluster directly actuates the instrument cluster illumination (up to model year 2018).

The COMAND controller unit (up to model year 2018) or the head unit (as of model year 2018) actuates the integrated control elements and sends the circuit 58d signal via the telematics CAN to the following control units, which then switch on the integrated control elements:

• Left rear display (model 222 with code 864 (Rear Seat Entertainment system))
• Right rear display (model 222 with code 864 (Rear Seat Entertainment system))
• Audio/COMAND display
• Audio/COMAND control panel (except code 446 (Touchpad only))
• Touchpad (with code 448 (Touchpad) or code 446 (Touchpad only))

The electronic ignition lock control unit sends the circuit 58d signal via the chassis FlexRay to the steering column tube module control unit. The steering column tube module control unit actuates the following components:

• Actuation via steering LIN and steering wheel electronics (up to model year 2018):
  • Left multifunction steering wheel button group
  • Right multifunction steering wheel button group
• Actuation via steering wheel CAN and steering wheel electronics (as of model year 2018):
  • Instrument cluster multifunction steering wheel button group
  • Head unit multifunction steering wheel button group
• Direct actuation:
  • DIRECT SELECT lever

The electronic ignition lock control unit sends the circuit 58d signal over the periphery CAN to the electric parking brake control unit. The electric parking brake control unit actuates the electric parking brake switch directly.

The electronic ignition lock control unit sends the circuit 58d signal via interior CAN to the following control units:

• Active belt buckle control unit (model 222 with CODE 305 (PRE-SAFE in rear))
• Front SAM control unit
• Climate control control unit
• Rear control unit (model 217)
• Left front door control unit
• Right front door control unit
• Left rear door control unit (model 222)
• Right rear door control unit (model 222)
• Overhead control panel control unit (as of model year 2018)

The active seat belt buckle control unit (model 222 with code 305 (PRE-SAFE in rear)) actuates the following component parts directly:

• Left rear seat active belt buckle illumination in left rear seat active belt buckle motor
• Right rear seat active belt buckle illumination in right rear seat active belt buckle motor

The front SAM control unit actuates the following components:

• Direct actuation:
  • Stowage compartment illumination
  • Right front footwell lamp
  • Left front footwell lamp
  • Left rear footwell lamp
  • Right rear footwell lamp
  • Front center console cup holder ambiance illumination
  • Exterior lights switch
  • Cigarette lighter with front ashtray illumination (with code 301 (Ashtray package/smoker package))
  • Cigarette lighter with ashtray lighting, rear (model 222 with code 301 (Smoker package) and except code 223 (Electrically adjustable rear bench seat))

• Cigarette lighter with illumination, rear center console (model 222 with code 301 (Smoker package) and code 223 (Electrically adjustable rear bench seat))

• Actuation via the instrument panel LIN:
  • Analog clock
  • Driver-side instrument panel button group
  • Center instrument panel button group (up to model year 2018)
• Actuation via roof LIN (up to model year 2018):
  • Overhead control panel control unit

The overhead control panel control unit directly actuates the switch, controls and symbol illumination of the integrated controls and the following components:

• Surround lamp in inside mirror
• Rear ambient lamp (model 222)
• Rear dome lamp ambient lighting (model 217.4) in rear dome lamp
• Emergency call system button group (model 217.4 with code 351 (Emergency call system (HERMES) or code 360 (HERMES UMTS) or code 362 (HERMES LTE))

The overhead control panel control unit directly actuates the eyeglasses box illumination irrespective of the circuit 58d signal from a circuit 15R ON status onwards.

The climate control control unit actuates the search and symbol illumination of the following components via A/C operating LIN:

• Climate control operating unit
• Rear climate control operating unit (model 222)

The rear control unit (model 217) actuates the following component parts:

• Actuation through left rear LIN:
  • Left rear seat heater switch (with code 872 (Seat heater in rear))
• Actuation through right rear LIN:
  • Right rear seat heater switch (with code 872 (Seat heater in rear))

The left front door control unit actuates the following components:

• Actuation via left front door LIN:
  • Power window and outside mirror adjustment switch group, driver side
  • Left front seat adjustment switch group
• Direct actuation:
  • Left front door door handle illumination
  • Trunk lid release button (model 222 except CODE 881 (Remote trunk closing))
  • Driver trunk lid control button (model 222 with code 881 (Remote trunk closing), model 217)
  • Left front door central locking interior switch

The right front door control unit actuates the following components:

• Actuation via right front door LIN:
  • Right front seat adjustment switch group
• Direct actuation:
  • Right front door door handle illumination
  • Power window switch, front passenger side
  • Right front door central locking interior switch

The left rear door control unit (model 222) actuates the following component parts:

• Actuation via left rear door LIN:
  • Left rear door switch group (with code 297 (Roller sunblinds in rear doors) or code 413 (Panoramic sliding sunroof) or code 540 (Electric roller sunblind for rear window))
  • Left rear seat switch group, seat adjustment (with code 223 (Electrically adjustable rear bench seat))
• Direct actuation:

• Left rear door door handle illumination
• Left rear door power window switch (except code 297 (Roller sunblinds in rear doors) and except code 413 (Panoramic sliding sunroof) and except code 540 (Electric roller sunblind for rear window))

The right rear door control unit (model 222) actuates the following component parts:

• Actuation via right rear door LIN:
  • Right rear door switch group (with code 297 (Roller sunblinds in rear doors) or code 413 (Panoramic sliding sunroof) or code 540 (Electric roller sunblind for rear window))
  • Right rear seat switch group, seat adjustment (with code 223 (Electrically adjustable rear bench seat))
• Direct actuation:

• Right rear door door handle illumination
• Right rear door power window switch (except code 297 (Roller sunblinds in rear doors) and except code 413 (Panoramic sliding sunroof) and except code 540 (Electric roller sunblind for rear window))

The door handle lighting is actuated after circuit 15C has been switched off for an additional 2 min (run-on).

Trunk lid control button (model 222 with code 881 (Remote trunk closing), model 217): 

If the trunk lid is open, the rear SAM control unit actuates the trunk lid control button at the trunk lid directly, irrespective of the circuit 58d signal. The rear SAM control unit independently evaluates the status of the trunk lid (open or closed).

Trunk lid emergency opening switch symbol illumination (with code 494 (USA version)): 

The rear SAM control unit actuates the trunk lid emergency opening switch directly irrespective of the circuit 58d signal. After the trunk lid is closed, the trunk lid emergency opening switch is actuated for 60 min with a frequency of 1 Hz and flashes green. The rear SAM control unit independently evaluates the status of the trunk lid (open or closed).

	Search and symbol illumination electrical function schematic		PE82.20-P-2054-97SEA
	Overview of interior illumination (IBL) system components		GF82.20-P-9997LF