as far as I know, the wiring for all options was included on our cars (just folded back out of sight usually) I have the "base" XJ8 (drivers seat height adjustment only and no memory for anything) This does not mean however that everything is simply "plug and play" in the case of the seats, the controls are on them (not the door) so you would have to replace the seat with a full electric one (as the motors will not be there) same for all the other items. I'm sure somebody more up to speed with these things can help.