2017 E220 front wiper fault
drivers side seems to me working ok, but passenger side has a fault and is moving to the wrong position, seems to stick and then move very fast and then clashes with the other blade.
It also no longer goes to the normal park position.
any thought on what could be the problem? I only found the fault this evening after dark so not had chance to take a look yet but looking for suggestions on what it could be.


