Manual Interior Lights Control, Function - GF82.20-P-2000FR

Model 257, 290 

up to model year 2021 

Courtesy of MERCEDES-BENZ USA

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:

• Switch on interior illumination 
• Switch on reading lights 
• Switch on mirror lamps 
• Switch on glove compartment lighting 

Switch on interior illumination 

The overhead control panel control unit directly reads in the status of the dome lamp buttons and sends it via interior CAN to the front SAM control unit. The front SAM control unit transmits the request to switch on the interior lighting via the interior CAN to the overhead control panel control unit, which then actuates the corresponding component parts.

The following components of the interior illumination are switched on or off manually by operating the front dome lamp button:

• Front dome lamp
• Left reading lamp (actuation via roof LIN)
• Right reading lamp (actuation via roof LIN)

The following components of the interior illumination are switched on or off manually by operating the rear dome lamp button:

• Left rear interior lamp
• Right rear interior lamp

The following component parts are also actuated for vehicles except code 891 (Premium ambient lighting):

By the front SAM control unit:

• Right front footwell lamp
• Left front footwell lamp

By the rear SAM control unit:

• Left rear footwell lamp
• Right rear footwell lamp

For vehicles with code 891 (Premium ambient lighting), the front SAM control unit sends the request to switch-on the footwell lamps over the interior CAN to the ambient lighting control unit. The ambiance illumination control unit then actuates the following components over the vehicle interior ambiance illumination-LIN:

• Right front footwell lamp
• Left front footwell lamp
• Left rear footwell lamp
• Right rear footwell lamp

If the automatic interior lights control is activated after opening a door, it can be switched off manually using the respective reading lamp button. The respective area is then switched off completely.

Switch on reading lights 

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 reads in the status of the relevant reading lamp button directly and transmits 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 relevant reading lamp button:

• Left reading lamp through left front reading lamp button
• Right reading lamp through right front reading lamp button
• Left rear passenger compartment reading lamp through left rear passenger compartment reading lamp button (with code 891 (Premium ambient lighting))
• Right rear passenger compartment reading lamp through right rear passenger compartment reading lamp button (with code 891 (Premium ambient lighting))

Switch on mirror lamps 

The following mirror lamp components 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

To preserve the on-board electrical system battery (G1), the power supply is interrupted 30 min. after 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.

Switch on additional function requirements for glove compartment lighting 

• Circuit 15R ON

The electronic ignition lock control unit sends the status of circuit 15 to the front SAM control unit via interior CAN.

Switch on glove compartment lighting 

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. The glove compartment lamp is switched on.

After switching off circuit 15C, the glove compartment lamp is switched off after 40 s.

	Electrical function schematic for manual interior lights control		PE82.20-P-2056-97XBA
	Overview of interior illumination (IBL) system components		GF82.20-P-9997FR