Mercedes-Benz 2003 M-Class Operator's Manual page 104

Controls in detail
Lighting
Night security illumination
When you turn off the engine and the last
door has been closed, the following lamps
will remain lit:
Parking lamps
Tail lamps
License plate lamps
Front fog lamps
The combination switch must be set to
position U ( page 102).
i
You can reactivate this function within
ten minutes by opening a door or the
liftgate.
If you do not open a door or the liftgate
after turning off the engine, the lamps
will automatically switch off after
60 seconds.
104
Deactivating night security illumination
temporarily
Before leaving the vehicle turn the key
in the steering lock to position 0 then
turn it to position 2 and back to 0.
The night security illumination is deac-
tivated. It will reactivate as soon as you
reinsert the key in the steering lock.
Setting illumination time
1 Switch for fog lamps
Stop the vehicle.
Make sure that the ignition is switched
on.
All the lamps in the instrument cluster
light up.
Turn combination switch to
position M .
Press upper part 1 of switch until the
clock, located in the instrument clus-
ter, displays the actual illumination
time.
Press upper part 1 of switch again.
Each time the switch is pressed, the il-
lumination time increases by
15 seconds. You can set the illumina-
tion time between 0 (off) and
60 seconds.
Approximately five seconds after pressing
the switch, the illumination time is set and
the clock is displayed again.