If it's a repair, shop around: not all bodyshops are the same! Your insurer cannot fetter your right to choose who repairs the car. In my experience the best bodyshops have Porsche approval; I have to say I am unimpressed by those recommended by MB.

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