Mercedes-Benz W140 wiper malfunctions
SE 400
Why does the W140 wiper stop in the wrong position or stutter?
The cause can be an old relay, whose contacts should be cleaned, or the wiper motor's park switch. The relay is in the engine bay on top of the fuse box. Checking the switch requires taking the motor apart.
Why does the W140 wiper arm stick or not move in the corner?
The plastic gear inside the wiper housing can break up, and the pieces get caught between the moving parts. The gear is only available with the whole arm, so the linkage and arm are replaced as a single unit.
Can a simultaneous wiper and turn signal fault be caused by a relay?
Yes. If the wiper does not work and the turn signals behave strangely, a faulty multifunction relay can be the cause. If the relay is fine, check the operation of the multifunction switch.
Related articles
Mercedes-Benz W140 crumbling engine wiring harness insulationMercedes-Benz W140 ASR light comes on and the car goes into limp modeMercedes-Benz W140 ABS and ETS light on: wheel speed sensorMercedes-Benz W140 base module faults and symptomsMercedes-Benz W140 heater blower regulatorMercedes-Benz W140 heater blower not workingMercedes-Benz W140 central locking vacuum pump not workingMercedes-Benz W140 door will not open from the inside handle