I added heated seat (it was a kit of four but I decided to just heat my seat
) to my w123 by using a kit I bought on eBay. Peyton300TD added all four seat heaters to his w123 as well. We just put the heating pad between the foam and the tex, heats up pretty quick but I've seen faster. None the less it is a very nice feature, quite nice when it was 0*F out and my CCU decided to quit.
