I have a 2018 RR TD6. I regularly refill the DEF myself when required, but this time the warning message on the centre screen and the warning light in the upper left corner of the dash remain on even though I put in 3 gallons of fluid. I am concerned that the vehicle will not restart in 400 kms as it is currently warning. Do I need the dealer to reset the warning, or is this a glitch I can ignore for now? In other words, will the computer prevent restarts even if there is plenty of fluid in the tank? Thanks.