I've read the threads about grinding when backing up and the brake rust. But my wifes 2SS/A6 only does it when the wheels are turned sharp.
It doesn't do it if she backs up straight. And, it doesn't do it when I'm standing outside listening.
She has, on a couple of occassions heard it when turning the wheels sharply and going forward. (Like getting out of a parallel parking spot.)
She took it to the dealer and of course - they couldn't find anything wrong.
She can't tell if the "grinding" is coming from the front or rear or middle. It's just coming from under the car.
I'd believe the brake rust, but...
* It won't do it unless the wheels are turned sharply.
* It will do it even if only parked for a few minutes. (Not just when parked overnight.)
Any ideas?