Hard and cracking door window seals and weatherstripping are a real problem on the coupes, as the replacements are not available in the aftermarket, and are WILDLY expensive from Mercedes.

Seems like they usually start to shrink at the tops of the side windows and a large gap is created right where the front and rear windows meet. Lets in water and all kinds of wind noise!

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles