I put a set of BMW factory cloth replacement covers on my driver's seat recently. I looked at Purcell's website about rebuilding seats to see how to take them apart. It is a bit tricky the first time but Purcell's instructions are sufficient. I think you will need to remove the seat back from the bottom--at least I did. I pretty much took the seat completely apart. The cushions and bolsters are attached with hog rings and tabs on the steel frames. I took photos and made sketches before prying the hog rings off with needle nosed pliers. I'm not sure the effort was worth it, but the hog rings I found at upholstery shops were either much heavier (too big and very hard to use) or lighter (too small). (Rings are available from the dealer, too, but by then I didn't want to wait). I also cut some off with nippers (much faster). The fabric/vinyl is held to the foam cushions with long, thin staples. My staple gun didn't work at all, so I pulled and re-inserted all the staples by hand--it worked fine. The bolster covers slide right over the foam and are held in place by long wires and hog rings--no staples. I got the hog ring pliers at an auto parts store. The seats turned out better than I expected. I replaced my worn foam with foam from a pair of junkyard seats. Good luck.
