My tC is 1 month old, and just turned 1K miles. This weekend, while backing out of the driveway, I heard a slight grinding/friction sound coming from what sounds like the rear brakes. For the last 2 days since, I still hear it when backing out of the driveway, and again during the first couple stops I make. It seems to dissipate after that, but that could just be my imagination. I don't notice any weird feel with brake pedal, and no change in brake performance. I noticed for the first time right after the first time I washed and waxed it - not the first time it was washed mind you, but the first time I washed it myself. It's really not that noticeable - i.e. my wife didn't notice it, but I feel like something changed. Has anyone else experienced this, or have any idea what it could be?