Manual Interior Lights Control, Function - GF82.20-P-2000RFM
Model 205
as of model year 2019
Model 253 (except 253.99)
as of model year 2020
Model 253.99
Function requirements, general
- No overvoltage or undervoltage
Manual interior lights control in general
The manual interior lights control makes it possible to switch the interior illumination, the reading illumination, the mirror lamps and the glove compartment illumination on and off.
The manual interior lights control function encompasses the following subfunctions:
- Function sequence for interior illumination
- Function sequence for reading illumination
- Function sequence for mirror lamps
- Function sequence for glove compartment illumination
Function sequence for interior illumination
The overhead control panel control unit reads in the status of the dome lamp buttons directly and transmits it via the interior CAN to the front SAM control unit and to the rear SAM control unit (Model 205.1). The front SAM control unit sends the request to switch on the interior illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
The following components of the interior illumination are switched on or off manually by operating the front dome lamp button:
- Front dome lamp (Model 205.0/1/2/3, Model 253)
- Left interior/reading lamp (Model 205.4)
- Right interior/reading lamp (Model 205.4)
- Left reading lamp in inside rearview mirror (Model 205.0/1/2/3, Model 253 with code 876 (Interior Light Package), actuation via roof LIN)
- Right reading lamp in inside rearview mirror (Model 205.0/1/2/3, Model 253 with code 876 (Interior Light Package), actuation via roof LIN)
The following components of the interior illumination are manually switched on or off dimmed by operating the rear dome lamp button (Model 205.0/1/2/3, Model 253):
- Left rear interior lamp in left rear dome lamp (Model 205.0/1/2, Model 253)
- Right rear interior lamp in right rear dome lamp (Model 205.0/1/2 with code 876 (Interior Light Package), Model 253)
- Rear interior lamp in rear dome lamp (Model 205.3 with code 876 (Interior Light Package))
- Left rear vanity mirror dome lamp in left rear vanity mirror unit (Model 205.1 with code U05 (Make-up mirror in rear passenger compartment))
- Right rear vanity mirror dome lamp in right rear vanity mirror unit (Model 205.1 with code U05 (Make-up mirror in rear passenger compartment))
For model 205, Model 253.99 with code 531 (COMAND® APS) or model 253 with code 549 (Connect 20 HIGH (NTG6)), the interior lighting in the rear can also be activated or deactivated via voice control. The driver hands-free system microphone is directly read in by the head unit for this purpose. The head unit processes the speech signals and transmits the operation signals via the user interface CAN, electronic ignition lock control unit and interior CAN to the front SAM control unit. The front SAM control unit sends the request to switch on the interior illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
Model 205
as of model year 2019
with code 531 (COMAND® APS)
Model 253 (except 253.99)
as of model year 2020
with code 549 (Connect 20 HIGH (NTG6))
Model 253.99
with code 531 (COMAND® APS)
Detailed information on the voice control can be found in a separate document.
In model 253 with code 77B (Contactless gesture control at front) the reading lamps can also be switched on or off by means of hand motions. For this, the hand motion sensor is read in by the head unit via the telematics CAN. The head unit processes the information and transmits the operation signals via the user interface CAN, electronic ignition lock control unit and interior CAN to the front SAM control unit. The front SAM control unit sends the request to switch on the interior illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
Model 253 (except 253.99)
as of model year 2020
with code 77B (Contactless gesture control at front)
Detailed information on gesture control can be found in a separate document.
In vehicles with code 876 (Interior Light Package), and except code 877 (Ambient lighting), the front SAM control unit also directly actuates the following components of the footwell lighting for the interior lighting:
- Right front footwell lamp
- Left front footwell lamp
In model 205.1, the rear SAM control unit also actuates the following components of the footwell lighting directly in addition to the interior lighting:
- Left rear footwell lamp
- Right rear footwell lamp
In vehicles with code 877 (Ambiance illumination), the front SAM control unit transmits the request for switching on the footwell lamps via the interior CAN to the ambiance illumination control unit. The ambient lighting control unit then actuates the following component parts:
- Left front footwell ambient lighting (via roof ambient lighting LIN)
- Right front footwell ambient lighting (via roof ambient lighting LIN)
- Left rear footwell lighting ambient lighting (LED) (via cockpit ambient lighting LIN)
- Right rear footwell lighting ambient lighting (LED) (via cockpit ambient lighting LIN)
Function sequence for reading illumination
The reading illumination serves to illuminate a defined area in front of the user, without having a distracting dazzling effect on the driver.
The overhead control panel control unit directly reads in the status of the reading lamp button and transits this via the interior CAN to the front SAM control unit. The front SAM control unit sends the request to switch on the reading illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
The following reading lamp components can be switched on or off manually by pressing the reading lamp buttons:
- Front dome lamp (only a single LED at outside left) via the left front reading lamp button (Model 205.0/1/2/3, 253, except code 876 (Interior Light Package))
- Front dome lamp (only a single LED at outside right) via the right front reading lamp button (Model 205.0/1/2/3, 253, except code 876 (Interior Light Package))
- Left reading lamp via the left front reading lamp button (Model 205.0/1/2/3, 253, with code 876 (Interior Light Package), actuation via roof LIN)
- Right reading lamp via the right front reading lamp button (Model 205.0/1/2/3, 253, with code 876 (Interior Light Package), actuation via roof LIN)
- Left rear reading lamp via left rear reading lamp button (Model 205.0/1/2, Model 253 with code 876 (Interior Light Package))
- Right rear reading lamp via right rear reading lamp button (Model 205.0/1/2, Model 253 with code 876 (Interior Light Package))
- Left interior/reading lamp via the left front reading lamp button (Model 205.4)
- Right interior/reading lamp via the right front reading lamp button (Model 205.4)
Model 205.1
as of model year 2019
with code U05 (Vanity mirror in the rear)
When the rear dome lamp buttons are first pressed, the rear vanity mirror dome lamps are actuated along with the rear reading lamps. When the rear dome lamp buttons are pressed a second time, only the rear reading lamps are actuated.
For model 205, Model 253.99 with code 531 (COMAND® APS) or model 253 with code 549 (Connect 20 HIGH (NTG6)), the left reading lamp and right reading lamp can also be activated or deactivated via voice control. The driver hands-free system microphone is directly read in by the head unit for this purpose. The head unit processes the speech signals and transmits the operation signals via the user interface CAN, electronic ignition lock control unit and interior CAN to the front SAM control unit. The front SAM control unit sends the request to switch on the interior illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
Model 205
as of model year 2019
with code 531 (COMAND® APS)
Model 253 (except 253.99)
as of model year 2020
with code 549 (Connect 20 HIGH (NTG6))
Model 253.99
with code 531 (COMAND® APS)
Detailed information on the voice control can be found in a separate document.
In model 253 with code 77B (Contactless gesture control at front) the reading lamps can also be switched on or off by means of hand motions.
For this, the hand motion sensor is read in by the head unit via the telematics CAN. The head unit processes the information and transmits the operation signals via the user interface CAN, electronic ignition lock control unit and interior CAN to the front SAM control unit. The front SAM control unit sends the request to switch on the interior illumination via interior CAN to the overhead control panel control unit, which then directly actuates the corresponding components.
Model 253 (except 253.99)
as of model year 2020
with code 77B (Contactless gesture control at front)
Detailed information on gesture control can be found in a separate document.
Function sequence for mirror lamps
The mirror lamp switches are supplied with voltage by the overhead control panel control unit. The following mirror lamps can be manually switched on or off by opening or closing the corresponding mirror covers:
- Left sun visor mirror lamp via the left front mirror lamp switch
- Right sun visor mirror lamp over the right front mirror lamp switch
- Left rear vanity mirror illumination via left rear vanity mirror illumination switch (Model 205.1 with code U05 (Make-up mirror in rear passenger compartment))
- Right rear vanity mirror illumination via right rear vanity mirror illumination switch (Model 205.1 with code U05 (Make-up mirror in rear passenger compartment))
The power supply is switched off by folding the sun visor closed or by locking the vehicle.
To preserve the on-board electrical system battery (G1), the power supply is switched off at t = 30 min. following circuit 15 OFF. The power supply for the left sun visor mirror lamp and the right sun visor mirror lamp is switched off when the vehicle is locked using the central locking (CL [ZV]) system.
Additional function requirements for glove compartment illumination
- Circuit 15R ON
The electronic ignition lock control unit sends the status of circuit 15 to the front SAM control unit via the interior CAN.
Function sequence for glove compartment illumination
The glove compartment lamp switch is supplied with voltage by the front SAM control unit. Voltage is switched through to the glove compartment lamp by opening the glove compartment door.
When circuit 15C is switched off, the glove compartment lamp is switched off after 40 s.
| Electrical function schematic for manual interior lights control | PE82.20-P-2056-97FBB | ||
| Overview of interior illumination (IBL) system components | GF82.20-P-9997RFM |