Hi guys, I own a '91 300SL and have a wiper problem. It only occurs when I turn the wipers on "intermittent". They work irregularly, and after a few "swipes", they stop. Even when irregular, it stops at random locations across the windshield. I can push the switch and get it to move and eventually get it back to its "parked" position. Oh, if turned on to wipe in the regular mode, it works perfectly.