See also:

The windshield wipers are inoperative
The windshield wiper drive is malfunctioning. - Select another wiper speed on the combination switch. - Have the windshield wipers checked at a qualified specialist workshop. ...

Important safety notes
WARNING Grains of sand, particles of dirt and other abrasive materials can enter the brake system. This can lead to excessive wear and unpredictable braking efficiency. After the brakes have ...

Driving with summer tires
Observe the notes in the "Winter operation" section. ...