Mercedes-Benz W201 windscreen wiper faults
Mercedes-Benz W201 wiper sticks or moves slowly – what should I do?
Lubricate the linkage before replacing parts. Stop the wipers at the upper corner of the glass, open the plastic cover and grease the sliding piece of the arm. It is worth placing a piece of cardboard between the glass and the arm. It is worth lubricating a couple of times a year, because a stiff linkage strains the motor.
The wipers do not work at all or cut out – what is the fault?
The contact surfaces of the fuses oxidise even if the fuse looks intact. Clean them with sandpaper or replace the old fuses. The multifunction relay behind the fuse box can also be at fault: it heats up and gives irregular pauses. Check these before replacing the motor.
Why does the wiper not stop in the parked position or stop in the middle of a sweep?
The cause may be the park position switch inside the wiper motor, the stalk's whisker switch with its wiring, or the multifunction relay. The arm's fixing nut may also be loose, letting the arm bounce. Tighten the nut and check the linkage mounting.