Mercedes-Benz GL-Class 2009 Owners Manual - Manual (Page 396)

Replacing bulbs
394
X Make sure bulb 1 socket is attached
properly.
X Close the respective cover in the cargo
compartment.
X Close the tailgate.
License plate lamps
1 Screws
2 Lamp cover
X Loosen screws 1 of lamp cover to be
removed.
X Remove lamp cover 2 .
X Replace the bulb.
X Reinstall lamp cover 2 .
X Retighten screws 1 .
Adjusting headlamp aim
1 V Vertical centerline
2 H Horizontal mounting height, measured
from the center
Correct headlamp adjustment is extremely
important. High beam adjustments
simultaneously aim the low beam. To check
and readjust a headlamp, follow the steps
described:
X Park the vehicle on a level surface 25 feet
(7.6 m) from a vertical test screen or wall.
X Make sure the vehicle has a normal tailgate
load.
X Switch on the low beam headlamps B .
If the beam does not show a beam pattern as
indicated in the figure left, then follow the
steps below:
X Open the hood ( Y page 267).
Example illustration headlamp driver’side
3
Headlamp vertical adjustment screw
4 Headlamp vertical adjustment screw
X Always turn adjustment screws 3 and 4
simultaneously for vertical adjustment until
the headlamp is adjusted as shown in
1 .
Turn clockwise for upward movement and
counterclockwise for downward
movement.
Graduations:
R Screw 3 : 0.50° pitch
R Screw 4 : 0.67° pitch
Practical hints