Mid/rear Seats Assembly problems of the 2011 BMW 328

The back seat melted for no known reason. It started in the backseat arm rest, and I had to pay to get it fixed, you can see that the leather is a different color, then it moved onto the seat. No one ever sits back there, I went to braman BMW and they said it had to do with the elements, I didn't know that you had to keep it in a garage, that is something that should of been told ahead of time. I don't have a garage so it's impossible, there should be a recall. Other manufacturers like Lexus has had recalls on similar issues.