Opel ASTRA K 2015 Owner's Manual page 17

Windscreen washer
Pull lever.
Windscreen washer system 3 94.
Washer fluid 3 227.
Wiper blade replacement 3 230.
Rear window wiper
OFF : off
INT : intermittent operation
ON : continuous operation
In brief
Rear window washer
Push lever.
Washer fluid is sprayed on the rear
window and the wiper wipes a few
times.
Rear window wiper and washer
3 96.
15