For you deisel owners. Was listening to a youtube video, cant remember which one but it was with someone that had technical knowledge on the cars systems. The question was asked will the car still run with no add blue in the tank. The simple answer was "YES" just dont turn your ignition off as it wont restart. My take on this is, leave your car running and get straight to the dealer, especially if out in remote areas. Id carry some spare add blue in the event your system starts a constant burn off due to a faulty sensor at the DPF, burns off more than required or your tank level reads incorrectly. Worth noting to prevent you being stuck in a life threatening situation