WITH YOUR DEALER:
The easiest way to refill your AdBlue is to talk to your Nissan authorised dealer, either as part of your normal maintenance programme or as a separate visit. If your car shows a warning that it is low on AdBlue you should make an appointment immediately.
It is also possible to refill AdBlue yourself. It is available widely at filling stations and automotive stores in packages of 1.5, 5 and 10 litres.