Symbol And Ambiance Illumination, Function - GF82.20-S-2100TRA

Model 447.6

Model 447.7

except code ZH6 (Marco Polo ACTIVITY)

Model 447.8

except code ZK7 (Equipment line MARCO POLO)

Model 448

Courtesy of MERCEDES-BENZ USA

Shown on switch and controls and symbol illumination, model 447.8

Courtesy of MERCEDES-BENZ USA

Shown on switch and controls and symbol illumination, model 447.6/7

Courtesy of MERCEDES-BENZ USA

Shown on ambiance illumination (with CODE LC1 (Ambiance illumination)), model 447.8

Shown on ambiance illumination (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) model 447 7

Courtesy of MERCEDES-BENZ USA

Function requirements, general

No overvoltage or undervoltage (operating voltage range U from 8.5 to 17 V)

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 switch and controls and symbol illumination
Function sequence for ambiance illumination (with CODE LC1 (Ambiance illumination)), model 447.8, model 448.8 or with CODE LC6 (Illumination in rear grab handle with reading spotlight)), model 447.7, model 448.7

Function sequence for switch and controls and symbol illumination

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

The switch and controls and symbol illumination is switched on by unlocking the vehicle remotely, by opening a vehicle door or by changing the status of circuit 15.

Model 447.8, model 448.8

The luminosity to be used to implement the switch and controls and symbol illumination can be continuously adjusted using the instrument illumination brightness control in the illumination switch.

The signal acquisition and actuation module (SAM) control unit reads in the signals of the instrument illumination brightness control directly and transmits these via interior CAN, the gateway for user interface CAN and the user interface CAN to the instrument cluster (IC) control unit.

Model 447.6/7, model 448.7

The luminosity to be used to implement the switch and controls and symbol illumination can be adjusted using the following buttons in the instrument cluster (IC [KI]) control unit:

Instrument, switch and controls illumination button, bright (without CODE CL4 (Multifunction steering wheel with trip computer))
Instrument, switch and controls illumination button, dark (without CODE CL4 (Multifunction steering wheel with trip computer))
Left multifunction steering wheel button group (with CODE CL4 (Multifunction steering wheel with trip computer))
Right multifunction steering wheel button group (with CODE CL4 (Multifunction steering wheel with trip computer))

The instrument cluster (IC [KI]) control unit directly reads in the signals of the instrument, switch and controls illumination buttons, bright and dark (without CODE CL4 (Multifunction steering wheel with trip computer)).

The instrument cluster (IC [KI]) control unit reads in the signals of the left and right multifunction steering wheel button group (with CODE CL4 (Multifunction steering wheel with trip computer)) via steering wheel electronics, steering LIN, steering column tube module control unit (MRM) and chassis CAN.

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

Model 447.8, model 448.8

The electronic ignition lock (EZS) control unit transmits the status of the central locking (CL) and the status of circuit 15 via the chassis CAN, the gateway for user interface CAN and the user interface CAN to the instrument cluster (IC) control unit.

The front door control units transmit the status of the front doors (open or closed) via the interior CAN, the gateway for user interface CAN and the user interface CAN to the instrument cluster (IC) control unit.

The sliding door control units send the status of the sliding doors (with CODE T55 (Electrical actuation for right sliding door) or with CODE T56 (Electrical actuation for left sliding door)) (open or closed) via interior CAN, gateway for user interface CAN and user interface CAN to the instrument cluster (IC [KI]) control unit.

The signal acquisition and actuation module (SAM) control unit sends the status of the sliding doors (without CODE T55 (Electrical actuation for right sliding door) and without CODE T56 (Electrical actuation for left sliding door) or with or without CODE T19 (Left sliding door)) via interior CAN, gateway for user interface CAN and user interface CAN to the instrument cluster (IC [KI]) control unit.

Model 447.6/7, model 448.7

The electronic ignition lock (EZS) control unit sends the status of the CL [ZV] and the status of circuit 15 via chassis CAN to the instrument cluster (IC [KI]) control unit.

The front door control units send the status of the front doors (open or closed) via interior CAN to the instrument cluster (IC [KI]) control unit.

The instrument cluster (IC) control unit evaluates all of the incoming information, generates the circuit 58d signal and transmits it to the following control units for actuation of the switch and controls and symbol illumination:

Via user interface CAN to the radio (Audio/COMAND) (model 447.8, 448.8)
Via the interior CAN to the Radio (Audio) (model 447.6/7) (with CODE EN6 (Audio 10) or with CODE EN7 (Audio 15))
Via user interface CAN, gateway for user interface CAN and chassis CAN to the electronic ignition lock (EZS) control unit (model 447.8, 448.8)
Via the chassis CAN to the electronic ignition lock (EZS) control unit

Model 447.8, model 448.8

The radio (Audio/COMAND) actuates the integrated controls and transmits the circuit 58d signal via the telematics CAN to the following components, which then actuate the integrated controls:

Audio/COMAND display control unit
Central operating unit (COU [ZBE]) control unit
- The central operating unit (COU) control unit transmits the circuit 58d signal via the telephone keypad LIN to the following components, which then actuate the integrated controls:
  - Left lower control panel control unit (LCPL [UBFL])
  - Right lower control panel (LCPR [UBFR]) control unit

The electronic ignition lock (EZS) control unit transmits the circuit 58d signal via the chassis CAN to the steering column tube module (MRM) control unit.

The steering column tube module (MRM) control unit actuates the following components:

Actuation via steering LIN and steering wheel electronics:
- Left multifunction steering wheel button group (with CODE CL4 (Multifunction steering wheel with trip computer))
- Right multifunction steering wheel button group (with CODE CL4 (Multifunction steering wheel with trip computer))
Direct actuation:
- DIRECT SELECT selector lever (with transmission 722.9)

The electronic ignition lock (EZS) control unit transmits the circuit 58d signal via the interior CAN to the following control units:

Signal acquisition and actuation module (SAM) control unit
Automatic air conditioning (AAC [KLA]) control and operating unit (with CODE HH4 (THERMOTRONIC automatic climate control) or with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC)) (model 447.8, 448.8)
Air conditioning control and operating unit (KLA-V & KLA-H) (with CODE HH4 (THERMOTRONIC automatic climate control) or with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC)) (model 447.6/7, 448.7)
Left front door control unit
Right front door control unit
Right sliding door control unit (E-LSTR) (with CODE T55 (Electrical actuation for right sliding door) and with CODE W68 (EASY-PACK liftgate)) (model 447.8, 448.8)

The signal acquisition and actuation module (SAM) control unit actuates the following components:

Direct actuation:
- Light switch
- Front cigarette lighter with illumination electrical connector
- Right front footwell lamp (model 447.8, 448.8)
- - Right front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
  - Left front footwell lamp (model 447.8)
  - Left front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
  - Left B-pillar footwell lamp (model 447.8, 448.8)
  - Right B-pillar footwell lamp (model 447.8, 448.8)
  - Left C-pillar footwell lamp (model 447.8, 448.8)
  - Right C-pillar footwell lamp (model 447.8, 448.8)
  - Left short cockpit ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
  - Right long cockpit ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
  - Left sliding door ambiance illumination (with CODE LC1 (Ambiance illumination) and with CODE T19 (Left sliding door) or with CODE T56 (Electrical actuation for left sliding door)) (model 447.8, 448.8)
  - Right sliding door ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
  - Left center sidewall ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Left rear sidewall ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Right rear sidewall ambiance illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Cup holder light strip (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Left center sidewall cup holder illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Left rear sidewall cup holder illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Right rear sidewall cup holder illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Left pop-out window switch (with CODE W32 (Electric pop-out window, passenger compartment)) (model 447.7/8, 448.7)
- Right pop-out window switch (with CODE W32 (Electric pop-out window, passenger compartment)) (model 447.7/8, 448.7)
- Electric parking brake indicator switch (model 447.8, 448.8)
- Actuation via the instrument panel LIN:
  - Driver assistance systems control panel control unit (with CODE EZ7 (Active Parking Assist) or with CODE JS1 (360 degree camera) (model 447.8, 448.8) or with CODE JW5 (Lane Keeping Assist))
- Actuation via roof LIN:
  - Overhead control panel (OCP [DBE]) control unit

The overhead control panel (OCP [DBE]) control unit directly actuates the switch and controls and symbol illumination of the integrated controls and also the following components:

Dome lamp in left front grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)

Dome lamp in right front grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
Dome lamp in left rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
Dome lamp in right rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
Ambiance illumination in left front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
Ambiance illumination in right front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
Ambiance illumination in left rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
Ambiance illumination in right rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)

Model 447.8, 448.8

The automatic air conditioning (AAC [KLA]) control and operating unit (with CODE HH4 (THERMOTRONIC automatic climate control) or with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC)) actuates the switch and controls and symbol illumination of the following operating units via climate control LIN:

FRONT heater/air conditioning operating unit switch (with CODE HH4 (THERMOTRONIC automatic climate control) or with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC))
REAR heater/air conditioning operating unit switch (with code HZ7 (Semi-automatically controlled A/C, TEMPMATIC in rear))

The left front door control unit actuates the following components:

Actuation via left front door LIN:
- Driver door control panel
- Left seat climate control switch group (with CODE H16 (Seat heater for driver) or on model 447.8, 448.8 with CODE SE0 (Seat climate control for driver))
- Driver electrical seat adjustment switch (with codeSF1 (Luxury electrically adjustable driver seat))
Direct actuation:
- Left front door handle recess illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
- Driver central locking interior operation switch

The right front door control unit actuates the following components:

Actuation via right front door LIN:
- Right seat climate control switch group (with CODE H15 (Seat heater for front passenger) or on model 447.8, 448.8 with CODE SE1 (Seat climate control for front passenger))
- Front passenger electrical seat adjustment switch (with CODE SF2 (Electrically adjustable front passenger seat))

Direct actuation:

Front passenger power window switch
Right front door handle recess illumination (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
Front passenger central locking interior operation switch

The right sliding door control unit (E-LSTR) (with CODE T55 (Electrical actuation for right sliding door) and with CODE W68 (EASY-PACK liftgate)) (model 447.8, 448.8) directly actuates the following components:

Close liftgate interior operation switch (with CODE W68 (EASY-PACK liftgate))

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

Function sequence for ambiance illumination (with CODE LC1 (Ambiance illumination)), model 447.8, 448.8 or with CODE LC6 (Illumination in rear grab handle with reading spotlight)), model 447.7, 448.7

The ambiance illumination 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.

Model 447.8, 448.8

The luminosity and the color in which the ambiance illumination is to be implemented can be selected using an appropriate menu on the radio (Audio/COMAND). Different zones can also be defined using this menu.

The following zones can be selected:

"Front" zone, driver and front passenger area
"Rear" zone, rear area
"Complete" zone, all areas

The luminosity can be set in 5 stages. 7 different colors can be selected.

The radio (Audio/COMAND) transmits the relevant information about these settings via the user interface CAN, the gateway for user interface CAN and the interior CAN to the signal acquisition and actuation module (SAM) control unit.

Model 447.7

The luminosity and the color in which the ambiance illumination is to be implemented can be selected using an appropriate menu in the instrument cluster (IC [KI]) control unit.

Model 447.7 without CODE CL4 (Multifunction steering wheel with trip computer)
- Operation takes place via the menu button and the reset button which are read in directly by the instrument cluster (IC [KI]) control unit.
Model 447.7 with CODE CL4 (Multifunction steering wheel with trip computer)
- Operation takes place via the left and right multifunction steering wheel button group. The signals are read in by the instrument cluster (IC [KI]) control unit via steering wheel electronics, steering LIN, steering column tube module control unit (MRM) and chassis CAN.

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

The electronic ignition lock (EZS) control unit transmits the status of the CL and the status of circuit 15 via the interior CAN to the signal acquisition and actuation module (SAM) control unit.

The front door control units transmit the status of the front doors (open or closed) to the signal acquisition and actuation module (SAM) control unit via the interior CAN.

Model 447.8, 448.8

Model 447.7

The ambiance illumination is deactivated t = 3 s if the vehicle is locked.

The signal acquisition and actuation module (SAM) control unit evaluates all incoming information and transmits the request to switch on the ambient illumination to the following control units:

Via interior CAN:
- Left front door control unit
- Right front door control unit
Via roof LIN:
- Overhead control panel (OCP [DBE]) control unit

The signal acquisition and actuation module (SAM) control unit actuates the following components directly:

Right sliding door step illumination (model 447.8, 448.8)
Right front footwell lamp (model 447.8, 448.8)
Right front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.7, 448.7)
Left front footwell lamp (model 447.8, 448.8)
Left front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.7, 448.7)
Left B-pillar footwell lamp (model 447.8, 448.8)
Right B-pillar footwell lamp (model 447.8, 448.8)
Left C-pillar footwell lamp (model 447.8, 448.8)
Right C-pillar footwell lamp (model 447.8, 448.8)
Left short cockpit ambiance illumination (model 447.8, 448.8)
Right long cockpit ambiance illumination (model 447.8, 448.8)
Left sliding door ambiance illumination (with CODE T19 (Left sliding door) or with CODE T56 (Electrical actuation for left sliding door)) (model 447.8, 448.8)
Right sliding door ambiance illumination (model 447.8, 448.8)
Left center sidewall ambiance illumination (model 447.8, 448.8)
Left rear sidewall ambiance illumination (model 447.8, 448.8)
Right rear sidewall ambiance illumination (model 447.8, 448.8)
Cup holder light strip (model 447.8, 448.8)
Left center sidewall cup holder illumination (model 447.8, 448.8)
Left rear sidewall cup holder illumination (model 447.8, 448.8)
Right rear sidewall cup holder illumination (model 447.8, 448.8)
Left front illuminated door sill molding (model 447.8, 448.8)
Right front illuminated door sill molding (model 447.8, 448.8)
Left sliding door illuminated door sill molding (with CODE T19 (Left sliding door) or with CODE T56 (Electrical actuation for left sliding door)) (model 447.8, 448.8)
Right sliding door illuminated door sill molding (model 447.8, 448.8)

Model 447.8, 448.8

The illuminated door sill moldings are actuated with different maximum values when the corresponding door is opened as a function of the ambient brightness.

The ambient brightness is detected by the light sensor.

The humidity sensor/light sensor/rain sensor (with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC)) or the humidity sensor/light sensor/rain sensor/sun sensor (with CODE HH4 (THERMOTRONIC automatic climate control)) directly reads in the signals from the light sensor, evaluates them and sends information on the ambient brightness (twilight level) via roof LIN to the signal acquisition and actuation module (SAM) control unit.

The left front door control unit directly actuates the left front door handle recess illumination (model 447.8, 448.8).

The right front door control unit directly actuates the right front door handle recess illumination (model 447.8, 448.8).

The overhead control panel (OCP) control unit actuates the following components directly:

Dome lamp in left front grab handle (with CODE LC3 (Illumination in rear grab handle))
Dome lamp in right front grab handle (with CODE LC3 (Illumination in rear grab handle))
Dome lamp in left rear grab handle (with CODE LC3 (Illumination in rear grab handle))
Dome lamp in right rear grab handle (with CODE LC3 (Illumination in rear grab handle))
Left front grab handle ambiance illumination
Right front grab handle ambiance illumination
Left rear grab handle ambiance illumination
Right rear grab handle ambiance illumination

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

Search and symbol illumination electrical function schematic	Model 448.8	PE82.20-S-2054-97VDA
	Model 447.8 except code ZK7 (Equipment line MARCO POLO)	PE82.20-S-2054-97TRA
	Model 447.6 Model 447.7 except code ZH6 (Marco Polo ACTIVITY)	PE82.20-S-2054-97TRB
Electrical function schematic ambiance illumination	Model 448.8	PE82.20-S-2053-97VDA
	Model 448.7	PE82.20-S-2053-97VDB
	Model 447.8 with code LG2 (LED Light package) except code ZK7 (Equipment line MARCO POLO)	PE82.20-S-2053-97TRA
	Model 447.6 with code LG2 (LED Light package) Model 447.7 with code LG2 (LED Light package) except code ZH6 (Marco Polo ACTIVITY)	PE82.20-S-2053-97TRB
Overview of interior illumination (IBL) system components		GF82.20-S-9997TRA