Have you pulled that right wheel and tried to tell if it's the brake/rotor or bearing (meaning you can put your ear right down on the sound or clearly see it when the rim/wheel are removed)? If you still are unsure, you can easily pull the caliper or pads. If it's still making noise, bearings are all that's left. At some point the rubbing better stop! I recently replaced the rotors/pads on my 95 E320 and when done I had a brake rub sound. I ultimately found that tightening the wheel bearings was the fix (although I packed them as part of the process).