JM7403
New Registration
1989 560SL wipers had problem of the one of the two sweeping beyond the chrome frame around the window . I tried turning the circular plastic pieces at the bottom of the wipers, and that made it even worse. They now over-reach proper sweep, are not parallel, and stop inthe middle of the windshield when turned off. Obviously those round black plastic pieces have something to do with the adjustment, but I need to exactly what they do and how they work