Gentlemen:

Thanks for the replies............

A few details that were inadvertantly left out of the original post:

1999 SL 500 sport - triple silver (exterior, soft top, hard top) 40K miles

The stitching that's coming loose is about 2 inches long on the driver's side rear panel - window side only of the double stitching.

The worn areas are on the corners of the rear-most ridge (above and to either side of the rear window) and are only about 1 inch long or less.

The rest of the top is really in great shape. No stains and no other worn areas. I cleaned the windows (which were almost opaque) with plastic polish and they are like new now.................no current leakage, but the missing stitching will leak I'm sure.

Sorry to leave the details out.......the upholstery shop should be able to handle this stitching? Any way to treat (water proof) and/or stop this "wearing" on the ridge corners?

Thanks again!