A few people have asked about this recently, and I fitted mine today (took about 3 minutes!) so I took a few photo's to help others: Part Numbers: Isofix Bar - 8EO 813 545A Sleeves - 8LO 887 233 (x2) Torx Bolts - WHT 001 230 £44.04 in total These are the parts: At first I thought I would need to remove the seat bench, but by lowering the seat back down it is possible to expose the bolt holes. NOTE I have an Avant with folding rear seats, a saloon will be different and folding rear seats are much less common: Anyway by dropping the seat you can see the bolt holes as indicated: It is then possible to slide the Isofix bar between the seats and line it up with the holes in the floorpan, and then screw the bolts tight. I don't know the recommended torque, so just wound them as tight as my screwdriver would go! Seat up and your done! I fitted the sleeves initially which is supposed to help aligning the seat base easier, but have taken them off as I have heard they can deform the seat, which I can quite believe. Thats it, hope it is of use to someone!