I was driving my '06 3.2 S-Line A4 this weekend, and twice had the power steering cut out and come back. The first time was coming out of a sharp corner at about 35mph, where it became noticeably harder to unwind the turn and return the wheel to center. The second time was later that night in my driveway at 5 mph. The wheel was difficult to turn as if there were no power assist.

The dealer can find nothing, and of course it will not act up for him. Has anyone else had this experience? Thanks.