Windshield Wiper problem
 

Hi all.
I have a problem with the wiper on my 1999 E class. One night I was out driving it was just a light drizzle outside, and I just pushed the tip of the stalk every now and then to wipe. Then suddenly the monoblade wiper stopped on the right side, not to return to its parked position.
Ever since that happened the wiper is only working in fast position. The delay and slow speed is not working.
I was wondering if anyone have had any experience with this kind of problem. The windshield washing system and the rear wiper is working ok.

Thanks
Steinar