Porsche 928 1980 Owner's Manual page 35

Rear window wiper
To avoid scratching the glass, the rear win-
dow should be sufficiently wet before turning
on the wiper.
To actuate the wiper, push the rocker switch
in the center console.
The wiper action disengages or engages
automatically when the luggage compart-
ment lid is opened or closed.
When cleaning the rear window, the wiper
should be lifted only slightly.
34