Headlight Adjustment - Porsche Cayenne Owner's Manual

Headlight Adjustment

f Check tire pressure and adjust if necessary.
f Please see the chapter "TIRE PRESSURES,
COLD (68 °F/20 °C)" on Page 354.
f Please see the chapter "REPLACING BULBS"
on Page 326.
Adjustment
The adjustment is made with the vehicle ready to
drive and the fuel tank completely filled.
The driver's seat must be loaded by a person or a
165lbs. (75kg) weight and the tire pressures must
meet the prescribed values. After being loaded,
the car must be rolled a few meters so that the
suspension can settle.
For checking the headlight adjustment, the verti-
cal position of the cutoff of the lowbeam (see fig.)
has to be projected on a vertical screen (wall) in
distance of 24.6 ft. (7.5 m) from the front lens of
the headlamp.The correct position of the cutoff is
3.0 in. (7.5 cm) at 24.6 ft. or 7.5 m (0.4°) below
a horizontal line, x cm from ground to the center
of the headlamp lens.
Lateral adjustment of the headlights should be
carried out at a specialist workshop with an optical
adjustment unit.
Distance
Visual aim shall be performed at not less than
24.6 ft. (7.5 m) (this value is a rounded down con-
version from the 25-foot distance typical of field
aim using a screen). The 24.6 ft. (7.5 m) distance
is measured from the headlamp lens to the
viewing screen.
Floor
The surface upon which the vehicle rests is flat
and approximately level.
Screen
The screen upon which headlamp beams are pro-
jected is perpendicular to the floor and the
vehicle's longitudinal axis, flat, uniformly light in
color, unobstructed, and wide and high enough to
accommodate the vehicle beam patterns to be
aimed.
The screen should be wide enough to provide at
least 3.3 ft. (1 m) of space outboard of the
vehicle's headlamp spacing.
Minor Repairs
339