I upgraded my 16' rims on my 2001 to the 17' monoblocks that are standard on the 430. Occasionally when I drive on the highway, I feel as if I'm going to lose control of the car-like the wheels are fighting me on curves in the road. Anyone else experiencing this problem and what is it? My MB dealer told me the only solution is to put my 16' rims back on. I don't think so...especially since these are the MB recommended upgrade rims.