I've had my S for 8 months and it seems that the back bumper panel alignment has gotten worse over time. The driver side seems flush but the passenger side seems to be popping out now. Can't figure out what's happened since there's no damage at all to the bumper. Not sure if they had to remove the bumper during a past service visit. Has anyone else had this issue? Could this just be some unsnapped clips and something the service center can address?