Mercedes-Benz 2001 CLK-Class Cabriolet - Manual (Page 290)

287 Exterior lamps
Technical
data
Instruments
and controls
Operation Driving
Instrument
cluster display
Practical hints Car care Index
5. Vertical headlamp aim (low beams on):
Turn adjusting screw (1) (counterclockwise to adjust
headlamp downward, clockwise upward) until the
headlamps illuminate the test screen as shown. The
vertex of the angle formed in each beam image
should align with the vertical and horizontal
centerlines (8 and 9).
The left and right headlamps must be adjusted
individually.
Note:
If it is not possible to obtain a proper headlamp
adjustment, have the system checked at your authorized
Mercedes-Benz Center.