I'm sorry, I've been totally dumb; I thought you were referring to the hard top, when obviously you mean the convertible soft top. Duh. Not much help, I'm afraid.

But if the new top was fitted recently, I'd go back to the fitting dealer.

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190