Mercedes-Benz 2009 GL-Class Automobile User Manual


 
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