Just for reference sake. You would only need your D if your truck trailer combo is over 11000kg. It would be with a one ton, that trailer and a rig inside, just thought I would pipe up with that info. I stopped and talked with a really nice gentleman at the scales one day. Tired of getting wrong info from people that have "heard this from my sisters boy friends, aunt who was once married to a truckers kid brother". Another point worth mentioning is that as a G class driver you can haul 11000kg combo as long as your vehicle is not registered for more. Eg jimbog if your f600 is registered for 15000kg then if you were long hauling with a buddy he would have to have a D license. Even to drive it empty. Something else I clarified with mr mto at the scales.