Mercedes-Benz 2010 M-Class Operator's Manual page 319

License plate lamps
X
Loosen screws : of lamp cover to be
removed.
X
Remove lamp cover ;.
X
Replace the bulb.
X
Reinstall lamp cover ;.
X
Retighten screws :.
Adjusting headlamp aim
V Vertical centerline
:
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 L.
If the beam does not show a beam pattern as
indicated in the figure left, then follow the
steps below:
X
Y
Open the hood ( page 212).
The adjustment screws are located under the
cover panel.
X
Insert a suitable tool into the openings in
the panel cover. The direction of arrows
= and ? indicate the angle in which the
tool has to be inserted in oder to access the
adjustment screws.
X
Always turn the adjustment screws equally
for vertical adjustment until the headlamp
is adjusted as shown in :. Turn clockwise
for upward movement and
counterclockwise for downward
movement.
Graduations:
Screw at arrow =: 0.67° pitch
R
Screw at arrow ?: 0.50° pitch
R
The left and right headlamps must be
adjusted individually.
Replacing bulbs
Z
317