A friend of mine had this, but with the steering support (540d). It completely failed while he drove fast in a corner. He is a strong guy, but had a real hard fight, keeping the car on the road. The papers of what the dealer had to work and parts which haf to replaced is 3 pages long. It did not occure again since then, but He doesn't feel comfortable driving it now. Well.. most of the time his girlfriend drives it
