Thanks for the replies. I got the middle bench seat out today after a bit of dismantling. It seemed that the well in the carpet where the center latch mechanism clamps to the floor was so packed with dirt and trash that it might have gummed up the lock. It may be good preventative for D2...

Thanks. I'll figure it out and post back the fix/breakage.

I see that this is an old thread, but did you ever get your back seat unstuck? I've got the same issue. Thanks.