Porsche 928S 1983 Driver Manual page 32

Wipe-wash lever
The wipe-wash lever has 6 switch positions.
0 Wipers off
1 Slow wipe
2 Fast wipe
3 Very fast wipe
4 Delay wipe. The wipers operate automa­
tically at regular intervals. The delay inter­
val can be adjusted by turning the knurled
knob A under the right hand side of the
instrument panel.
5 Wipers and washers. By pulling the lever
towards the steering wheel, the electric
washers as well as the wipers are switch­
ed on.
6 Head lamp washers. By pushing the lever
towards the instrument panel, the head­
lamp washers are operated, but only when
the headlights are on. Refer to paragraph
on headlamp washers.
The windscreen should be sufficiently wet
before the wipers are actuated to avoid
scratching it. The wiper blades should be
checked regularly, and replaced at least
once a year.
Concentrated washer system
With the concentrated washer system, even
dirt embedded in silicon-based polishes can
be removed from the screen.
A short press on the switch Β under the right
hand side of the instrument panel causes
the concentrated Porsche cleaning solution
to be pumped onto the screen. The duration
of the spray is controlled by a time relay to
avoid too heavy consumption of the solu­
tion. If necessary the operation can be re­
peated.
The windscreen washers and wipers can
then be operated to finish off the cleaning
process.
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