I haven't had my original trans rebuilt yet (at 381,000! Thank you very much MB) but I have done a little research and found Transmeister in Orange CA (SO CA). Ted is the owner and only services and rebuilds MB transmissions. He does not do any other MB work. He's been in business since 89 and 90% of his customers are other MB shops that don't have a trans guy in house. I've dropped by the shop. He only uses MB factory parts (except for a couple of O-rings and things like that). MB has gone through extensive band material changes and continues to update these materials. He really knows his tranys. Has two really nice dishwasher type cleaners that completely clean the trans. His thoughts are that he wants the trans to look as if it came from the factory. His experience is at 3 different MB dealers. Caliber, Slemons (now F. Jones) and House of Imports.