I also have a 2008 Cabrio. My selt belt retracts OK, but I have a problem with the passenger side seat belt locking up so that I can't pull it out to buckle it. Or, sometimes it locks in so tight when the passenger is wearing it that they can't move. Took it to the dealer. Had to wait for a part to arrive to fix it. Wrong part was delivered and had to wait again. Was "fixed" for about 3 months, then the problem started up again. In the meantime, I've moved across country and haven't had time to drive to another dealer to try to fix it again.