See also:

Office
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Switching the wipers on/off and brief wipe
Do not switch on the wipers if frozen Do not switch on the wipers if they are frozen onto the windshield; otherwise, the wiper blades and the windshield wiper motor may be damaged.◀ Swi ...

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Replace remote control batteries. Radio stations or TV channels are grayed out and c ...