Same thing happened to me a couple of months back, the gauge said i had 70ks till empty. I was parked on a hill and it would not start, called road side assist they rolled me to the bottom of the hill and it started for about 15sec then stalled. The guy then put in a 5lt can of diesel and it suddenly had a 1/4 of a tank. I also sometimes get the low oil warning when parked on a decline.