The wiper of my C230 stops at top position, so I have to drive with wiper in the middle of windshield. I forced to move to bottom but whenever the car starts wiper returns to that position. Months ago it started to stop little bit upper position than bottom, now it became dangerous to drive. Any advice will be helpful.

 

It was loosened bolt connecting lever to the wiper motor. Mechanics locked the bolts at right position of the lever. It took one and half hour(to reach that bolt was not so easy)and $50 at my favorite auto center (not at the DEALER).