Our 1996 Mercedes C 250 single arm wiper has intermittently over 4 years operated with difficulty. It struggles, almost stalls at two points across the windscreen - appear to coincide when the blade arm performs its cunning extention and withtraction trick.
If it were possible to dismantle to give something a drop of oil or smear of grease I imagine it would greatly relieve the problem. This problem is causing electrical load problems as I noted the steering wheel control stick was getting hot as well. Could it be a loose electrical connection causing the problem with nothing mechanically wrong with the wiper arm system? I understand the latter rarely give problems.
Any experience with this one greatly appreciated - thanks.