Mercedes-Benz B-Class Operator's Manual page 117

Problems with the windshield wipers
Problem
The windshield wipers
are jammed.
The windshield wipers
fail completely.
The spray nozzles are
misaligned.
Possible causes/consequences and M Solutions
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 wiper drive is malfunctioning.
X
Select another wiper speed on the combination switch.
X
Have the windshield wipers checked at a qualified specialist
workshop.
The windshield washer fluid from the spray nozzles no longer hits
the center of the windshield. The spray nozzles are misaligned.
X
Have the spray nozzles adjusted at a qualified specialist
workshop.
Windshield wipers
115
Z