I have the same problem for quite some time. You can look at my post, bobterry99 and some other members gave me good testing procedures. I would still like to fix my top, if you get some good addvice send it down. Thanks!

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2001 C320 Sport 17" AMG Potenza S03
1991 500SL 18" AMG Contysport
1993 190E 2.6 17" AMG Contysport
2002 G500