Yep, be gentle with the seats as you take them out, the fabric that is stitched to the MB-Tex at the edges tends to get weak and brittle, its easy to punch a few fingers through it. The backrest of the back seat can be a pain to get out, just make sure ALL of the bolts are out before you yank it out. It will lift straight up with a few forceful tugs upward, then out. Like don said, the bottom has the red buttons. When putting the bottom back in, make sure it is all the way back as far as it can go, then push down on it hard, and the buttons will catch and latch it back up.
Maybe I am just repeating Don, but I mainly just wanted to inform you of the fragile fabric found behind the seats.