Opel ASTRA Owner's Manual page 80

78 Instruments and controls
Adjustable wiper interval
Wiper lever in position INT.
Turn the adjuster wheel to adjust the
desired wipe interval:
short interval : turn adjuster
wheel upwards
long interval : turn adjuster
wheel downwards
Windscreen wiper with rain
sensor
HI : fast
LO : slow
AUTO : automatic wiping with rain
sensor
OFF : off
In AUTO position the rain sensor
detects the amount of water on the
windscreen and automatically
regulates the frequency of the
windscreen wiper.
For a single wipe when the
windscreen wiper is off, press the
lever downwards to position 1x.
Do not use if the windscreen is frozen.
Switch off in car washes.
Adjustable sensitivity of the rain
sensor
Wiper lever in position AUTO.
Turn the adjuster wheel to adjust the
sensitivity:
low sensitivity : turn adjuster
wheel downwards
high sensitivity : turn adjuster
wheel upwards