Cannot take off seats of BMW Z3

The seats are only held on by 4 bolts, 2 different sizes, the back being slightly bigger as i remember. After you get them unbolted tilt the seat forward and release the 4 wired connections underneigth the seat and lift the seat out.
To replace the electric button on the side (seat adjustment button), after removing the seats you must remove the plastic trim at the bottom. Stop before you do that though and make sure that it is that piece that is broken, and not the button itself. That happened to me and after all the work I did to remove the seat and disassemble it, i merely had to replace the button and didnt have to remove anything. Just look on the button, and on the outside of the unit on the seat and look where plastic would have been broken off.

There are 4 bolts holding all car seats if you can get at least 2 off than you should be alright as long as you can squees a hacksaw or dremel to be able to cut along the seat rail that will remove the seat so you have access to the other 2.