Mercedes-Benz G-Class 2011 Owners Manual - Manual (Page 106)

Problems with the windshield wipers
The windshield wipers are obstructed
Leaves or snow, for example, may be
obstructing the windshield wiper movement.
The wiper motor has been deactivated.
X For safety reasons, you should remove the
SmartKey from the ignition lock.
X Remove the cause of the obstruction.
X Switch the windshield wipers back on.
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
X Select another wiper speed on the
combination switch.
X Have the windshield wipers checked at a
qualified specialist workshop.
104
Windshield wipers
Lights and windshield wipers