I'd avoid Pass & Weisz Inc Porsche Audi in Burlington. My experience is that they couldn't fix a paper bag, let alone something as convoluted as an Audi. European Performance Engineering (Bill Pfister) definitely know their stuff as far as engines/drivetrain/suspension/etc goes. Highly recommended if not particularly convenient to "Boston". (508) 651-1316 (Natick). -RDH