Mercedes-Benz E-Class Operator's Manual page 144

Windshield wipers
142
Problems with the windshield wipers
Problem
The windshield wipers
are jammed.
The windshield wipers
fail completely.
Possible causes/consequences and M M Solutions
Leaves or snow, for example, may be obstructing the windshield
wiper movement. The wiper motor has been deactivated.
For safety reasons, you should remove the SmartKey from the
X
ignition lock.
or
Switch off the engine using the Start/Stop button and open the
X
driver's door.
Remove the cause of the obstruction.
X
Switch the windshield wipers back on.
X
The windshield wiper drive is malfunctioning.
Select another wiper speed on the combination switch.
X
Have the windshield wipers checked at a qualified specialist
X
workshop.