They are a bit of a bugger if the seat can't be folded down, but if you can get it to move its not as bad. Remove the hard trim off the outside edge of the seatback, and you should see some hogrings on the bottom edge. Clip them and the uopholstry should come off the top of the seat. From there it is just a matter of figuring out which fragile and expensive plastic tab broke off and replacing it.