i just bought i 1989 735i with 110,000 on it and the guy told me he had these bushing that he never got around to putting on. they are about the size of a can of soda and are rubber. My question is my car shakes at highway speed, not when acceleratin or braking, but when i have the cruise on or when im keeping a steady velocity. do these bushing i got with the car have to go on, how hard of a job is this to try...i have worked on domestic cars but no imports. how much would a dealer get to do something like this thanks david