Don't know about N reg, but the earlier Dis can be 'bled' of air in the system by cracking off and injector until you see diesel whilst you are cranking over the engine (you will need help with this one, or a very complicated array of mirrors!). Theoretically Dis are self-bleeding, but I have know people flatten the battery trying to get rid of the air!
Non't know why they stopped fitting hand primer pumps, blunger on top of the fuel filter. try filling the fuel filter with diesel first, saves cranking on the starter. hand primers are fitted to the mk6s.
35 years of driving,repairing,sleeping in transit's lovin every minute.