One of them had: SD4, longer exit, tank almost empty, display still shows 22 km remaining range. Suddenly the gas acceptance is no longer correct, only to one third and to switch up (automatic) he also did not want to normal. So to the next tank ran and fully pumped (722 km + 57.8 l). After that everything immediately normal again. There is such a kind of emergency program to drive particularly sparingly on the last kilometers or he waved to the driver with a “flash pile” around him at the e to force the next tank before the tank is completely empty? In the BA it is just that you should not drive it empty and that, if it happens, it needs a few kilometers to adjust the engine management back to normal.