I just checked the price on a rear glass for a 300SD several weeks ago. The glass place I went to said that their wasn't an aftermarket version of the back glass for this car. I don't have the quote in front of me but IIRC the price (installed) was just over $300 for the Mercedes glass. I remember checking with a Mercedes dealership about a year ago and they wanted $800+ for it (glass only)! You should definately go to a good independent glass place that gets discounts on the OEM glass.