Mercedes-Benz 2012 A-Class Owner's Manual page 122

Windscreen wipers
120
Problems with the windscreen wipers
Problem
The windscreen wipers
are jammed.
The windscreen wipers
fail completely.
The spray nozzles are
misaligned.
Possible causes/consequences and M Solutions
Leaves or snow, for example, may be obstructing the windscreen
wiper movement. The wiper motor has been deactivated.
X
For safety reasons, you should remove the key from the ignition
lock.
X
Remove the cause of the obstruction.
X
Switch the windscreen wipers back on.
The windscreen wiper drive is malfunctioning.
X
Select another wiper speed on the combination switch.
X
Have the windscreen wipers checked at a qualified specialist
workshop.
The windscreen washer fluid from the spray nozzles no longer hits
the centre of the windscreen. The spray nozzles are misaligned.
X
Have the spray nozzles adjusted at a qualified specialist work-
shop.