Mercedes-Benz E-class 1999 Control Switch - Manual (Page 23)

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5. Horizontal headlamp aim
(low beams on):
Turn adjusting screw (1)
(counterclockwise to adjust to
the left, clockwise to the right)
until the headlamps (low beam)
illuminate the test screen as
shown. The vertex of the angle
formed in each beam image
should align with the vertical
centerline (11) of each lamp.
The left and right headlamps
must be adjusted individually
6. The "O" on the indicator wheel
(9) should align with projection
(10). If it does not, with a small
screwdriver, pry indicator wheel
up and rotate so that the "O"
aligns with projection (1). Push
down indicator wheel until it
snaps in place.
Graduations: 0.38° pitch.
Note:
If it is not possible to obtain a proper
headlamp adjustment, have the
system checked at your authorized
Mercedes-Benz dealer.