Have been wanting to install seat heating option in my 400e. From what I've been able to learn on this board, switching seats with ones that already have such an option should be easier than rebuilding the seats themselves. Have a potentially great deal on a set of 1993 400e seats that may have seat heaters. They have one set of 8 cables wrapped together, one set of 6 cables wrapped together, then two sets of 2 smaller wires each. From what I can see under my current non-heated front seats, one of these sets of wrapped cables may indeed be for seat heater option. Anyone have a wiring diagram or other source for such information to help me ascertain the answer? Secondly, would the wiring harness be present in the console such that I could add appropriate switches and cabling to complete such a seat switch? A third unrelated question, in what year did the w124 (400e model) switch from the standard seat arm rest to the flip up compartment model? Was it 1993? Thanks for any assistance!