Interior lighting (IBL) function - GF82.20-P-0002GZ: Notes

MODEL 164.1

Fig 1: Identifying Interior Lighting (IBL) Components Location - (MODEL 164.1) (1 Of 2)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Interior Lighting (IBL) Components Location - (MODEL 164.1) (2 Of 2)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function

The interior lights system (IBL) is responsible for illumination of the vehicle interior depending on various factors (e.g. door open). The master control unit for this is the overhead control panel control unit.

In addition to this, the illumination can be switched on and off manually.

Operating possibilities

Manual actuation via operating switches
- Front and rear roof lighting
- Front reading lamp
When a door is opened the
- roof lighting
- 2nd seat row reading lamps,
- entrance illumination and
- footwell illumination
are switched on.
If the standing lamp (circuit 58d) is switched on the
- door inside handle illumination and
- search and function illumination
are switched on.
If the central locking (ZV) is unlocked the
- roof lighting
is switched on in dimmed state. Switch-off is 30 seconds after unlocking.
If the transmitter key (A8/1) is removed the
- roof lighting
is switched on in dimmed state. Switch-off is automatic in line with the run-on time set in the instrument cluster. The run-on time can be set to 0, 5, 10, 15 or 20 s.
If the anti-theft alarm system (ATA [EDW]) code 551 is triggered or in the event of a panic alarm (USA only) the
- roof lighting and
- footwell illumination
are switched on without dimming.
Actuation via contact switch
- vanity mirror illumination
- glove compartment illumination

Illumination

Entrance and exit illumination

With a present "Night" signal from the rain/light sensor and after opening one of the doors, the rear SAM control unit (N10/8) sends a signal over the CAN-B to the overhead control panel control unit. The overhead control panel control unit then sends the switch-on signal to the respective front door control unit, which switches on the corresponding entrance/exit lamp. The rear entrance/exit lamps are actuated by the rear SAM control unit.

Front and rear door inside handle illumination

For circuit 15R on and with a pending "Night" signal from the rain/ light sensor and after switching on the standing lamp (circuit 58d) the

left front door inside handle illumination (E17/11),

right front door inside handle illumination (E17/12),
left rear door inside handle illumination (E17/13) and
right rear door inside handle illumination (E17/14)

are activated.

The front door inside handle illumination is actuated by the respective front door control unit.

Actuation of the rear door inside handle illumination is performed by the rear SAM control unit.

Footwell lights

The rear SAM control unit reads in the status of all vehicle doors. With a present "Night" signal from the rain/light sensor and after opening one of the doors, the rear SAM control unit sends a signal over the CAN-B to the overhead control panel control unit.

In response, the overhead control panel control unit then sends the switch-on signal for the footwell lamps to the front SAM control unit (N10).

Ambient lamps

The ambient lamps integrated into the outside mirrors are actuated by the front door control units. For this purpose, the overhead control panel control unit receives the unlock signal from the EIS [EZS] control unit (N73). The signal to switch on the ambient lamps in the outside mirrors is then sent by the overhead control panel control unit along with the "Night" signal from the rain/light sensor to the door control unit over CAN-B.

Search and function illumination

If the standing lamp is switched on, the brightness of all illuminated controls is automatically adapted by a phototransistor integrated into the instrument cluster to the level of brightness in the vehicle interior.

The pushbutton switches instrument and controls illumination button, bright (A1s4) and instrument and controls illumination button, dim (A1s5) on the instrument cluster can be used to set the brightness to suit individual needs.

Roof lighting

The roof lighting contains the manual and automatic switching on of the front interior lamps in the overhead control panel control unit and rear dome lamp.

Front reading lamps

By pressing the corresponding switch in the overhead control panel, the attendant reading lamp in the inside rearview mirror unit is switched on undimmed.

Rear reading lamp

By pressing the lens of the reading lamps integrated in the grab handles of the 2nd seat row, the reading lamps are switched on undimmed. They can be switched off by pressing the lens again.

Glove compartment illumination

The glove compartment illumination with switch is switched on when circuit 15R is on by opening the glove compartment. It is switched off by closing the glove compartment or automatically after 15 minutes of bus idle.

Vanity mirror illumination

By opening the mirror cover in the sun visor, the left front vanity mirror illumination switch (S101) or the right front vanity mirror illumination switch (S102) is automatically actuated and the left front illumination or right front illumination is switched off. It is switched off by closing the corresponding mirror cover or automatically 30 minutes after circuit 15 off.

Load compartment lamps

If the rear-end door is opened, the rear SAM control unit receives a signal from the rear door locking unit. If at the same time the rear SAM control unit receives the "Night" signal via CAN-B from the rain/light sensor, then the rear-end door ambient lamp is switched on. At the same time the rear-end door warning lamp is switched on.

The rear-end door ambient lamp is switched off by closing the rear-end door. The rear-end door warning lamp is switched off similarly by closing the rear-end door or also automatically after 10 minutes by the rear SAM control unit.

Interior lighting (IBL) component network		GF82.20-P-0002-02GZ
Switching interior lights on / off manually, function		GF82.20-P-2009GZ
Switching interior lights on / off automatically, function	When opening a door	GF82.20-P-2010GZ
	When switching on the standing lamp	GF82.20-P-2010GZA
Inside rearview mirror unit, component description		GF68.49-P-2105GZ
Rain/light sensor, component description		GF54.21-P-6000GZ
Front SAM control unit, component description		GF54.21-P-7010GZ
Rear SAM control unit, component description		GF54.21-P-7030GZ
Adjusting switch and controls illumination, function		GF54.30-P-2010GZ
Left front door control unit, component description		GF72.29-P-4141GZ
Right front door control unit, component description		GF72.29-P-4142GZ
Overhead control panel control unit, component description		GF82.20-P-5216GZ
Electronic ignition/starter switch control unit (EIS) component description		GF80.57-P-6000GZ
Exterior lamp switch, component description		GF82.10-P-4106GZ