I get a sound that, to me, sounds like a light grinding sound when accelerating normally between 25-35 mph. It does not happen under hard accleration. My dealer has heard it and acknowledges that a few other A6 3.2 owners have brought this up with them. I was wondering if others in Audi world have experienced this. The dealer says everything checks out but the sound continues.

I get that too....thought it just may be the FSI or something....
I had a turbo before this one, so I never thought much of this noise. Interesting to see if others hear it...