Symbol And Ambiance Illumination, Function - GF82.20-P-2100FG

Model 213 up to model year 2021 

Courtesy of MERCEDES-BENZ USA

Search and symbol illumination 

Courtesy of MERCEDES-BENZ USA

Ambiance illumination (with CODE 877 (Ambiance illumination)) 

Function requirements, general 

• No overvoltage or undervoltage

Symbol and ambiance illumination in general 

The symbol and ambiance illumination feature provides the brightness-adjustable illumination of all controls as well as the illumination of the vehicle interior. Symbol and ambiance illumination encompasses the following subfunctions:

• Function sequence for search and symbol illumination 
• Function sequence for ambiance illumination (with CODE 877 (Ambiance illumination)) 

Function sequence for search and symbol illumination 

Activating the switch and controls and symbol illumination makes it easier for the vehicle occupants to find important controls and to look for objects in the vehicle without having to switch on the ignition or the exterior lights to do so.

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 to be used to implement the search and symbol illumination can be continuously adjusted using the instrument illumination brightness control on the exterior lights switch. The front SAM control unit reads in the signals from the instrument illumination brightness control directly and sends them via interior CAN, electronic ignition lock control unit and 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 interior CAN, electronic ignition lock control unit and user interface CAN to the instrument cluster.

The rear door control units send the status of the rear doors (open or closed) via interior CAN, electronic ignition lock control unit and 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:

• Electronic ignition switch control unit
• Head unit

The electronic ignition lock control unit actuates the following component:

• KEYLESS GO start/stop button

The head unit activates the integrated controls and sends the circuit 58d signal over the telematics CAN to the following control units, which then switch on the integrated controls:

• Audio/COMMAND display
• Audio/COMMAND control panel (except code 446 (Touchpad only))
• Touchpad (with code 446 (Touchpad only) or code 448 (Touchpad))

The Audio/COMMAND control panel (except code 446 (Touchpad only)) or the touchpad (with code 446 (Touchpad only) or code 448 (Touchpad)) transmits the circuit 58d signal via the LCP LIN to the following control panels, which then actuate the integrated controls:

• Upper control panel control unit
• Left lower control panel
• Right lower control panel

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 wheel CAN and steering wheel electronics (as of 01.06.2018) or via steering LIN and steering wheel electronics (up to 31.05.2018):
  • Instrument cluster multifunction steering wheel button group
  • Head unit multifunction steering wheel button group
• Direct actuation:
  • DIRECT SELECT lever (transmission 725) The electronic ignition lock control unit sends the circuit 58d signal via interior CAN to the following control units:
  • Front SAM control unit
  • Climate control, control unit
  • Left front door control unit
  • Right front door control unit
  • Left rear door control unit
  • Right rear door control unit
  • Overhead control panel control unit

The front SAM control unit actuates the following components:

• Direct actuation:
  • Exterior lights switch
  • Cigarette lighter with front ashtray illumination (with code 301 (Ashtray package/smoker package))
  • Center console armrest stowage compartment switch and controls illumination
  • Front center console cup holder illumination
  • Right front footwell lamp
  • Left front footwell lamp
  • Electric parking brake switch
  • Front center console USB port (with code 899 (Multifunction telephony) or code 897 (Wireless mobile phone charging))

• Actuation via the instrument panel LIN:
  • Analog clock
  • Driver's side instrument panel button group (with code 235 (Parking Pilot with PARKTRONIC), code 489 (AIR BODY CONTROL), code 243 (Active Lane Keeping Assist) or code 238 (Active Lane Keeping Assist), code 23P (Driving Assistance Package) or code P20 (Driving Assistance Plus Package) or code 463 (Head-up Display), model 213.0/1 with engine 274, 654, 642 with code 540 (Electric roller sunblind for rear window), model 213.2 with engine 274, 654, 642 with code 287 (Folding rear seat backrest))

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 air conditioning operating unit (with code 581 (Automatic air conditioning))

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 switch group, seat adjustment (with code 221 (Electrically adjustable left driver seat) or code 275 (Memory package))
  • Left front seat climate control switch group (model 213.0/2 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger) or code 902 (Seat heater plus for driver and front passenger), model 213.1)
• Direct actuation:
  • Trunk lid release button (model 213.0/1 except code 881 (Remote trunk closing))
  • Driver trunk lid/liftgate control button (model 213.0/1 with code 881 (Remote trunk closing), model 213.2 with code 890 (EASY-PACK liftgate))
  • 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 switch group, seat adjustment (with code 222 (Electrically adjustable right front seat) or code 275 (Memory package))
  • Right front seat climate control switch group (model 213.0/2 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger) or code 902 (Seat heater plus for driver and front passenger), model 213.1)
• Direct actuation:
  • Passenger-side power window switch
  • Right front door central locking interior switch

The left rear door control unit actuates the following components:

• Actuation via left rear door LIN:
  • Left rear door switch group (with code 297 (Roller sun blind in rear doors))
• Direct actuation:
  • Left rear power window switch (except code 297 (Roller sun blinds in rear doors))
  • Left rear seat climate control switch group (model 213.0/2 with code 872 (Seat heater in rear), model 213.1)

The right rear door control unit actuates the following components:

• Actuation via right rear door LIN:
  • Right rear door switch group (with code 297 (Roller sun blinds in rear doors))
• Direct actuation:
  • Right rear power window switch (except code 297 (Roller sun blinds in rear doors))
  • Right rear seat climate control switch group (model 213.0/2 with code 872 (Seat heater in rear), model 213.1)

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

The overhead control panel control unit actuates the following components:

• Actuation via roof LIN:
  • Surround lamp in inside mirror
• Direct actuation:
  • Eyeglass box illumination

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.

Trunk lid/liftgate control button (model 213.0/1 with code 881 (Remote trunk closing), model 213.2 with code 890 (EASY-PACK liftgate): 

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

Trunk lid emergency opening switch symbol illumination (model 213.0 with code 460 (Canada version) or code 494 (USA version)): 

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

Function sequence for ambiance illumination (with CODE 877 (Ambiance illumination)) 

The ambient lighting is switched on by unlocking the vehicle remotely, by opening a vehicle door or by changing the status of circuit 15. In the process, different areas of the vehicle interior are illuminated indirectly. The luminosity and the color in which the ambiance illumination is to be designed can be adjusted using a corresponding menu in the head unit. The following zones can also be selected via this menu:

• "Front" zone, driver and front passenger area
• "Displays" zone, instrument cluster and Audio/COMMAND display lighting (with code 464 (Digital instrument cluster full display))
• "Rear" zone, rear area
• "Complete" zone, all areas

The luminosity can be set in several stages. 64 different colors can be selected.

Model 213 up to model year 2021 with code 464 (Instrument cluster 12.3" diagonal)

Certain color and brightness setting combinations (color values) can be stored assigned to the instrument cluster's display style (SPORT, CLASSIC, PROGRESSIVE). Thus an assigned ambient lighting color value can be activated by selecting a display style in the instrument cluster. As of 01.06.2017 the choice as to whether this assignment should go ahead can be configured in the instrument cluster.

The head unit transmits the relevant information about these settings via the user interface CAN, the electronic ignition lock control unit and the interior CAN to the ambiance illumination control unit.

After a vehicle door is opened, the ambiance illumination is actuated with 100_% luminosity.

The electronic ignition lock control unit sends the status of the central locking and the status of circuit 15 via interior CAN to the ambiance illumination control unit.

The ambiance illumination is deactivated 3 s after the vehicle is locked.

The ambient lighting control unit evaluates all incoming information and then actuates the following component parts:

Over left front door ambient lighting LIN:

• Left front door handle ambiance illumination
• Left front door ambiance illumination
• Left front door stowage compartment illumination
• Left front door sound system tweeter ambiance illumination (with code 811 (Advanced sound system))

Over right front door ambient lighting LIN:

• Right front door handle ambiance illumination
• Right front door ambiance illumination
• Right front door stowage compartment illumination
• Right front door sound system tweeter ambiance illumination (with code 811 (Advanced sound system))

Over left rear door ambiance illumination LIN:

• Left rear door handle ambiance illumination

• Left rear door ambiance illumination
• Left rear door stowage compartment illumination

Over right rear door ambiance illumination LIN:

• Right rear door handle ambiance illumination
• Right rear door ambiance illumination
• Right rear door stowage compartment illumination

Over cockpit ambient lighting LIN:

• Driver-side ambiance illumination
• Passenger-side interior ambiance illumination
• Passenger-side exterior ambiance illumination
• Inner upper full display digital instrument cluster ambient lighting (with code 464 (Full display digital instrument cluster))
• Outer upper full display digital instrument cluster ambient lighting (with code 464 (Full display digital instrument cluster))
• Inner lower full display digital instrument cluster (with code 464 (Full display digital instrument cluster))
• Outer lower full display digital instrument cluster (with code 464 (Full display digital instrument cluster))

Over vehicle interior ambient lighting LIN:

• Right front footwell lamp
• Left front footwell lamp
• Right rear footwell lamp
• Left rear footwell lamp
• Front center console cup holder illumination
• Center console armrest stowage compartment switch and controls illumination
• Left front center console ambiance illumination
• Right front center console ambiance illumination

Over roof ambient lighting LIN:

• Roof center midrange speaker ambiance illumination (with code 811 (Advanced sound system))

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

	Search and symbol illumination electrical function schematic		PE82.20-P-2054-97DBA
	Electrical function schematic ambient lighting	Model 213 up to model year 2021 with code 877 (Ambient lighting)	PE82.20-P-2053-97DBA
	Overview of interior illumination (IBL) system components		GF82.20-P-9997FG