Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hello,If both wiper and washer have stopped working, possibly the combination switch itself has failed. Check if other functions are working when switch is used.
The switch sends the control signals to front SAM module, which then actuates the pump and motor. It is possible to check what this module sees and actuates on the wipe/wash system with Star Diagnosis computer to pinpoint the cause. Some independent MB workshops have it besides authorized dealers.