Mercedes-Benz W203 wipers and washers not working
Why does the W203 windscreen washer not spray water?
The washer button must be pressed all the way down, otherwise the wipers just move. Other causes are a blocked pump inlet or washer nozzles, a seized non-return valve in the hose and a failed pump. If water only comes after several presses, the pump or its seal is often the cause.
Why do the W203 wipers not start?
First check wiper fuse 46 (40 A) under the bonnet on the driver's side. If the wipers and the washer pump do not react to the stalk at all, the fault may be in the multifunction stalk. If the wipers stop halfway across the glass, the plastic gear in the wiper motor may be worn.
Why does the W203 rear wiper not start or start by itself?
Inside the multifunction stalk there are many thin wires that can wear or break. Then the rear wiper does not start, or the wipers and indicator work on their own, often in frost. Replacing the stalk with a new one has fixed the fault.
Why does no washer fluid reach the W203 rear window?
Check in the corner of the tailgate whether the washer hose has come off its connector. Then the fluid runs into the tailgate. Otherwise the cause can be the washer pump or the nozzle.