While I have a couple of seat experts on board, let me ask you a question. My '09 developed a huge spontaneous crack in the upholstery of the seat panel shown below. I'm assuming I need to take this to an upholstery place to get the panel replaced. Can you take the seat back off without removing the whole seat? I think this crack developed from the inflatable cushion being max inflated for too long. I had the car for a year before I even noticed that adjustment was there. It came from the dealer max inflated.