Switching interior lights on / off automatically, function - GF82.20-P-2010GZ

MODEL 164

When opening a door

Shown on model 164.1

Fig 1: Switching Interior Lights ON/OFF Automatically Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function requirements

The rain/light sensor sends the "Night" signal
Door contact ON and OFF switch in "ON" position.

Function

Opening one of the doors is recognized by the rear SAM control unit by way of the corresponding central locking motor (ZV) and notified to the overhead control panel control unit via CAN-B.

Footwell lighting

After the overhead control panel control unit has received a signal about an open door from the rear SAM control unit, the overhead control panel control unit sends the switch-on signal for the footwell illumination to the front SAM control unit.

The footwell illumination on-period is as follows:

5 min as long as one of the doors is open
30 s after unlocking the vehicle
8 s after closing the last door

All four footwell lamps are switched each time.

Entrance/exit lamp

The switch-on signal for the entrance/exit lamps is transmitted by the overhead control panel control unit via CAN-B to the:

left front door control unit to switch on the left front door entrance/exit lamp,
right front door control unit to switch on the right front door entrance/exit lamp or
rear SAM control unit to switch on the left or right rear door entrance/exit lamp

The on-period is terminated when the corresponding door is closed or after 5 min by the overhead control panel control unit.

The on-period is extended or restarted as long as at least one door is open and circuit 15R is switched on or the vehicle has been locked or unlocked.

Dome lamp

When one of the front or rear doors is opened, the front interior lamps as well as the dome lamps in the 2nd seat row and the dome lamp in the 3rd seat row are switched on dimmed.

The lights are switched off under the following conditions:

8 s after the last door was closed and circuit 15 OFF or after
5 min if a door is open and circuit 15 is OFF

The OFF delay time for the dome lamps, when all doors are closed and circuit 15 OFF, can be set in the instrument cluster (A1) to 0, 5, 15 or 20 s.

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
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