Talk to Larry at Four Oaks Garage if near Santa Monica. My buddy swears by this guy. He services three or four of these cars, although usually not mine as I am in Ventura. If closer to Camarillo, I use and endorse Dan at Mark Motors- he's an award winning ex BMW tech who has been with several of the big LA area dealers, but went on his own. One thing though, is he is not into aftermarket mods and will advise against them in favor of factory spec. stuff.