So, this is an odd problem I've had as of late on 2011 S212. My third row got stuck open; it appears that the section of the wagon's floor between the second and third rows has shifted somehow and is slightly dragging on the third row backrest/trunk floor section on one side. The open hinge looks fine; I managed to rip off the leather pull strap trying to get it open, but that can be replaced with something.

Anyone had this issue, or have ideas on what it might be? My wagon is missing the cargo cover, although I'm not sure if that would have any impact on this. Anyhow, TIA for any ideas. I'm in the middle of replacing the Airmatic valve block and the headlight controller (or maybe the front SAM if that doesn't work), so this was an unwelcome addition!