Opel ASTRA Owner's Manual page 20

18 In brief
Windscreen and headlight
washer
Pull lever.
Windscreen and headlight washer
system 3 75, Washer fluid 3 205.
Rear window wiper
Press the rocker switch to activate the
rear window wiper:
upper switch : continuous
operation
lower switch : intermittent
operation
middle position : off
Rear window washer
Push lever.
Washer fluid is sprayed on the rear
window and the wiper wipes a few
times.
Rear window wiper/washer 3 77.