My E has 100,000 miles on it and lately it has started making a noise in the rear passenger wheel area. It seems to happen most frequently after I have driven at highway speeds for an extended time and then make a turn from the off-ramp. I will hear a rubbing (metal to metal) upon making a left hand turn. As soon as the wheel is straightened out the sound will go away. I have tried to go straight all the time but every once in a while I like to stop to smell the flowers. At low speeds - around town driving I never hear this. I have replaced the rear brakes and rotor, and the rear strut. I have taken the wheel off, the rotor off and cannot find any visible signs of wear. Any thoughts would be greatly appreciated.