Porsche 928 S 1984 Owner's Manual page 91

Headlight adjustment
Headlight adjustment should be done with a
headlight aiming device under the following
conditions:
At curb weight of car (i.e. car ready for use
and with full fuel tank).
Driver's seat should be occupied by a person
or a weight of approx. 155 lbs (70 kg).
Tire pressure must be correct.
Roll car forward a few feet so that the sus-
pension seeks its normal position.
Adjustment screws
Each headlight and fog light has two adjust-
ing screws, one for lateral setting and one
for vertical. By turning these screws left or
right, the corresponding adjustment in beam
position is effected.
Screw "a" (lateral adjustment)
right turn = beam moves right
left turn = beam moves left
Screw "b" (vertical adjustment)
right turn = beam moves up
left turn = beam moves down
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