In the Nashville area I would highly recommend using Erol's Autobahn in west Nashville. It's a bit of a drive for me, an hour plus or minus depending on traffic, but well worth the drive. I have used Erol for several years after trying 3 or 4 orther shops. Look for knowledge, honesty, and fairness. He is always very busy but they will usually squeeze me in as I normally wait for the vehicle.