I just had to get some transmission work done. I took it to AutoHaus Austin. They are an independent Mercedes shop that someone else on here said did good work last year. I never like taking my car to a mechanic but I am very happy with how they dealt with me and they ended up giving me a great deal for the work that was done. If you are in the Austin area I would give them a try. Just got the car back so hopefully no more problems for a long while.