We bought a 97 Z3 about a year ago. Yesterday I was going to rotate the tires due to some wear on the rears. When I attempted to remove the left front, no luck. A few whacks with a towel covered rubber malet, no luck. I noticed some rust on the rear wheels, where they met the hub, but no major resistence. This is my first occasion to pull the wheels. Could the fronts be stuck due to rust, brake dust, ??????