The M3 saga continues... after getting my car back, it continued to have problems, prompting me to bring it back to the dealer. After a day they diagnosed that there was an actual problem with the "cylinder ignition coil"... so they replaced all 6 of them and all was well. Until, of course, I drove back into the microsoft parking lot and trashed my air dam by getting too close to a curb. Dude, sometimes the universe is just trying to tell you something.