GF82.20-P-2100CW Symbol and Ambiance Illumination, Function

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

Function requirements for symbol and ambiance illumination, general
^ No overvoltage or undervoltage
^ C. 15R On
^ Circuit 58d > 0 %

Symbol and ambiance illumination, general
The symbol and ambiance illumination feature provides the brightness-adjustable illumination of all controls as well as the illumination of the vehicle interior.

The symbol and ambiance illumination feature comprises the following subfunctions:
^ Function sequence for generating circuit 58d
^ Function sequence for symbol illumination
^ Function sequence for ambiance illumination

Function sequence for generating circuit 58d
The following signals are read in and evaluated by the instrument cluster (A1) for controlling the symbol and ambiance illumination:
- "Standing lights On" status from the exterior lights switch (S1)
- Instrument illumination brightness control status (A1r1) (continuous adjustment of symbol and ambiance illumination from 0 to 100 %)
- "Night" status from the light sensor (B38/1) (without code (345) Rain sensor) or from the rain/light sensor (B38/2) (with code (345) Rain sensor)

The instrument cluster generates the circuit 58d signal from the incoming information and transmits it to the interior CAN for actuating the symbol and ambiance illumination.

Function sequence for symbol illumination
The circuit 58 signal is read in by the following control units.
- Radio (A2)
(with code (510) Audio 20 with CD changer or with code (523) MB Audio 20 radio)
- Radio with auto pilot system (A2/56)
with code (511) AUDIO 55 APS radio or with code (525) MB Audio 50 APS radio)
- COMAND controller unit (A40/3)
(with code (512) COMAND APS incl. DVD changer or with code (527) COMAND APS with single DVD drive (with navigation))
- Front SAM control unit with fuse and relay module (N10/1)
- Rear SAM control unit with fuse and relay module (N10/2)
- Automatic air conditioning control and operating unit (N22/7)
- Left front door control unit (N69/1)
- Right front door control unit (N69/2)
- Left rear door control unit (N69/3)
- Right rear door control unit (N69/4)
- Overhead control panel control unit (N70)
(with code (414) Power glass tilting/sliding sunroof)

The COMAND controller unit routes the circuit 58d signal of the following components to the telematics CAN:
- Audio/COMAND display (A40/8)
- Audio/COMAND control panel (A40/9)

The following components are actuated by the front SAM control unit via the instrument panel LIN:
- Upper control panel control unit (N72/1)
(with code (220) Parktronic system (PTS) or code (483) ADVANCED AGILITY package or code (540) Electric roller blind for rear window or code (873) Left and right front seat heater)
- Exterior lights switch
- Instrument panel switch group (S6/1)

The following components are actuated directly by the front SAM control unit:
- Overhead control panel electronics (N70/3) (without code (414) Power glass tilting/sliding roof)
- Cigarette lighter with front ashtray illumination (R3) (with code (301) Ashtray package/smoker package)
- Left center vent symbol illumination (E10/1)
Left front side air vent symbol illumination (E10/2)
Right front side air vent symbol illumination (E10/3)
Right center vent symbol illumination (E10/4)
(with code (954) Avantgarde, with code (955) Elegance or with code (876) Interior lights package)
- Rear vent symbol illumination (E10/5)
(with code (954) Avantgarde, with code (955) Elegance or with code (876) Interior lights package and additional code (581) Comfort automatic air conditioning)

Furthermore, the front SAM control unit routes the circuit 58d signal of the following control units to the chassis CAN:
- CDI control unit (N3/9) (on diesel engine)
- ME-SFI [ME] control unit (N3/10) (on gasoline engine)
- Steering column module control unit (N80)

From the CDI control unit or from the ME-SFI [ME] control unit it is supplied to the electronic selector lever module control unit (N15/5) (with transmission 722.6) on the drive train CAN, whereupon the electronic selector lever module control unit actuates the corresponding symbol illumination.

The steering column tube module control unit actuates the following components via the steering LIN:
- Left multifunction steering wheel button group (S110)
- Group of buttons on right of multifunction steering wheel (S111)

The rear SAM control unit actuates the trunk lid emergency opening switch (S88/10) directly (model 204.0 with code (494) USA version only).

The automatic air conditioning control and operating unit actuates the symbol illumination of the integrated controls directly and the rear automatic air conditioning operating unit (N22/4) (with code (581) Comfort automatic air conditioning) via the climate control LIN.

The following components are actuated by the left front door control unit via the left door LIN:
- Driver-side power window and outside mirror adjustment switch group (S20)
- Left front seat adjustment switch group (S22) (with code (275) Memory package (driver seat, steering column, mirror))

The following components are actuated directly by the left front door control unit:
- Trunk lid release button (S15/1) (model 204.0)
- Driver liftgate control button (S15/3) (model 204.2 with code (890) Automatic rear-end door)
- Left front door central locking interior switch (S85/5)

The following component is actuated by the right front door control unit via the right door LIN:
- Right front seat adjustment switch group (S23)
(with code (242) Electrically adjustable front passenger seat with memory)

The following components are actuated directly by the right front door control unit:
- Passenger-side power window switch (S21/2)
- Right front door central locking interior switch (S85/6)

The following component is actuated directly by the left rear door control unit:
- Left rear power window switch (S21/3)

The following component is actuated directly by the right rear door control unit:
- Right rear power window switch (S21/4)

Function sequence for ambiance illumination
The circuit 58 signal is read in by the following control units.
- Front SAM control unit
- Overhead control panel control unit
- Left front door control unit
- Right front door control unit
- Left rear door control unit
- Right rear door control unit

The following component is actuated by the front SAM control unit via the overhead control panel electronics:
- Ambient lamp (A67e3) in the inside rearview mirror (A67)

The following component is actuated by the overhead control panel control unit:
- Surround lamp in inside mirror

On vehicles with code (954) Avantgarde, with code (955) Elegance or with code (876) Interior lights package the following components are actuated: By the front SAM control unit:
- right front footwell lamp (E17/15)
- left front footwell lamp (E17/16)

By the left front door control unit:
- Left front door handle illumination (E17/11)

Right front door control unit:
- Right front door handle illumination (E17/12)

Left rear door control unit:
- Left rear door handle illumination (E17/13)

Right rear door control unit:
- Right rear door handle illumination (E17/14)

When unlocking the vehicle using the central locking, the components of the ambiance illumination are switched on at the set brightness value. The opening of a vehicle door triggers the actuation of the ambiance illumination at a brightness value corresponding to 100 %. After closing the vehicle door, the components are actuated again at the previously set brightness value.