Glue? There was no glue on mine. The seat I took apart was cloth, perhaps the leather ones are glued?
You forgot the lever for letting people out of the back seat. That was a PITA to get off.
As for the covering itself, that's pretty easy. You need a big set of wire clippers, it's held on there by hogrings. Just clip them and peel the leather off the top. Took me about 20 minutes to dissassemble the seat, and another 20 to get the cover off.