Porsche Cayenne Owner's Manual page 112

The rain sensor remains switched off if the wiper
lever is already in position 1 when the ignition is
switched on.
To switch the rain sensor on again:
f Move wiper stalk to position 0 and then to
position 1 – switching on is confirmed by one
wipe of the windshield – or
f Operate windshield washer system 5 –
switching on is confirmed by three wipes of the
windshield – or
f Change the sensitivity of the rain sensor with
four-stage switch A.
112
Lights, Turn Signals and Windshield Wipers
Changing the sensitivity of the rain sensor
Sensitivity can be set with switch A in 4 stages:
f Adjust rotary switch A upwards –
high sensitivity.
The setting is confirmed by one wipe of the
windshield.
f Adjust rotary switch A downwards –
low sensitivity.
2 – Front windshield wiper – slow
f Move wiper stalk upwards to the second click.
3 – Front windshield wiper – fast
f Move wiper stalk upwards to the third click.
At speeds of less than approx. ca. 2.5 mph
(4 km/h), rain sensor operation mode is
automatically activated if the windshield wiper is
switched on. If you exceed a speed of approx.
5 mph (8 km/h), the system switches to the
preselected wiper level.
4 – Front windshield wiper – one-touch
operation
f Move wiper stalk downwards. The front
windshield wipers go through one wipe cycle.