Hi Gary, not 100%\ sure with the i30, but my nephew has the late model 2.5 CR nissan turbo diesel Auto think it's a nivara duel cab 4WD. well he ran out of diesel at my place when it was almost new. it had a priming button on top of the fuel filter, and after putting 20 Lt in from a jerry can we pumped the button but would not start. he phonned nissan help they said its self priming, but the car was faceing downward on a slope, they told him to get it leavel so we did, after a lot of cranking over it finally fired up.
my i30 CRDi has the same button on the filter top so i would expect it would be the same. self priming. but don't quote me just check up with Hyundai service.