Porsche 928S 1983 Driver Manual page 44

Electric Sliding Roof
The sunroof is operated by a spring loaded
rocker switch on the middle console. Appro-
priate movement of the switch opens or
closes the sunroof. When released the
switch returns to the neutral position and
the roof stops in the required position. The
drive mechanism is equipped with a safety
clutch which disengages when a certain
resistance is met, thus excluding the possi-
bility of accidental injuries.
42
We do not recommend that the sliding sun
roof be operated at speeds in excess of 100
km/h. The force required to overcome the
resistance of the air pressure at higher
speeds can cause damage to the sliding
roof.
Manual Operation
A hand crank is provided for manual opera-
tion in the event of an electrical failure. To do
this the cover of the sunroof drive must be
removed. Pull the cover down at the rear and
unhook the spring. Unscrew the now visible
slotted screw with the screwdriver tip of the
hand crank. Before inserting the fork-end of
the crank remove spacers which were under
the screw. Turn the knurled screw of the
crank into the threaded hole in the drive