I need help.
I just got of work and as I am coming home and let go of the gas pedal I hear this weird noise. Kinda as if something was grinding or something, but only when I let go of the gas.
I took it to my uncle who is a mechanic for your normal, honda, ford etc etc and couldnt tell me what it was. I am taking it to the Audi dealer tomorrow and couldnt take it today due to the fact they were already closed.
Does anyone have an idea what it can be?
I dont seem to lose power. When it shifts gears down and up no noise and everything is fine. Only when I let go of the gas pedal it makes this sound.

Any info on this would be greatly appreciate.
By the way its a 2007 2.0 with about 68,000.