On your sliding door problem, I don't know if they will, but for a test do the wiring assemblies swap left to right or are they slightly different connectors on the ends? I am quite sure there is a difference of some sort, as they are a different part number, from when I bought mine. Yep I agree, a button for the tailgate as per the side doors would have been very useful, but given all the wiring and ecu for it, it may be a complicated job. Or it could be a doddle - jack into the wires for the overhead console switch? If there are only 2....... I have no idea. Or not??!!