I have had my car to 3 different MB dealers to fix my rough idle. None fixed it, one told me there was no rough idle after advising me to have it checked out two weeks earlier, another told me to junk the car without having done any tests on it and the third told me to live with it. Needless to say the only MB dealer I will eb returning to is the express service centre for fluid changes and brake work. Anything that requires a real mechanic will be handled by an independent.
1995 E420 - retired
1986 420SEL - retired