I had a problem with my transmission and took my car to two other shops that did not specialize in Mercedes before I called Rudy at Advance German Car. He told me to bring the car over the next morning and that evening Rudy was able to diagnose the problem. He had my car for less then a week and I felt the repair cost was fair. I now have my benz back and it has never driven better! These guys definitely know what they are doing.