How many miles on your car? In some cases shocks and subframe bushings are to blame. I went out West to Montana and the wind gusts blew my car ALL around. Go from pavement to bridge and the car would jump - hard to keep in lane! Two local MB mechanics suggested "weak shocks". I replaced them and the subframe bushings which were shot and now the car is much tighter. I haven't been in really windy conditions, but overall the car follows the road better and the front and rear of the car follow one another. So far, it seems the feathering on my front tires has gone away too...