To auto in for annual FSS Sch B service and was told my tires are wearing unevenly. They rotated the tires and when I left I noticed shaking in the steering. Took car back and they indicated that they had to re rotate the tires back to the original position and stressed i should get new tires. So I priced tires but wanted to know what causes the uneven wear, the Svc mgr gave a bunch of reasons but none seem valid to me because of my driving habits and mileage on the vehicle and the fact that I religiously come to Dealer for service. So ranged included wheel alignment, etc. Well they seem to have stopped the steering wheel shaking at least for about a week but then this excessive noise appears and sounds like vibration and whoop whoop sound. Called dealer back because not satisfied. So I'm researching and finding this seems to be common for the this vehicle year and type and wondering why MBUSA hasn't addressed the problem -- I'm contacting Corp directly!