I have a flutter in my 2011 A8L when I step on the throttle. Everytime that I express torque I get a flutter that sounds as if it is coming from under the driver's side dash. Any ideas?

 

I also am experiencing the exact same problem. It sounds like a playing card placed in turning bicycle spokes. We all know that sound. It is coming from exactly the same location and it is intermittent, but very audible. I have heard no good answers from the dealer, and no faults are apparent.