Opel ASTRA K 2015 Owner's Manual page 16

14 In brief
Hazard warning flashers
Operated by pressing ¨.
Hazard warning flashers 3 135.
Horn
Press j.
Washer and wiper systems
Windscreen wiper
HI : fast
LO : slow
INT : interval wiping
or
automatic wiping with rain
sensor
OFF : off
For single wipe when the wiper is off,
press lever down to position 1x.
Windscreen wiper 3 94.