Tyson did you ever get an answer on this? I've just picked up a second hand 2010 D40 tow bar which I have fitted to my 2012 model. The bar itself fits just fine (checked the bolt arrangement spacing etc) but come to plug the wiring in and found the plug on the truck doesn't match the plug on the tow bar:
This is the plug on the tow bar (appears to be four pin):
And these are on the truck (which appears to be a three pin and a five pin):
Either the different years have different plugs or I am trying to plug into the wrong plug (I can't see any others).
Anybody any ideas if this is the right plug in point, and can I get a plug adaptor or do a need to buy a new wiring harness for the tow bar so suit a 2012 model. Or alternatively does anybody know if I can simply cut the fittings off and connect/solder the wires to each other and if so what colour wires goes to what or is the wiring completely different hence the change in plug/socket configuration.