Cadillac deville 2000 Benutzerhandbuch

If you believe your headlamps need horizontal
(left/right) adjustment, follow the horizontal aiming
procedure. If you believe your headlamps need only
vertical (up/down) adjustment, follow only the vertical
aiming procedure.

Adjustment screws can be turned with an E8 Torx

R

socket or T15 Torx screwdriver.

Turn the horizontal aiming screw (A) until the 
indicator (B) is lined up with zero.

Once the horizontal aim is adjusted, then adjust the
vertical aim.