You control the rear windshield wiper by using the lower button on the left-hand steering wheel stalk.
Turning on and off
Press once on the lower button on the end of the left-hand steering wheel stalk.
The rear wiper turns on.
Press the button again to turn the rear wiper off.
Enabling automatic rear wiper while reversing
Press the vehicle symbol in the bottom bar and go to Settings.
Go to .
Turn it on.