I recently had problems with my 2007 roadster not starting, radio, instrumentment panel and headlights all worked but car would not start (no noise at all). Dealer said it was "SKREEM" but I didn't have any of the typical symtoms. However they replaced the door lock module part #05099541AA and it fixed my problem. Not sure if your problem is the same. My car was running fine, parked it on a Friday and next time I went out would not start.