Hello guys, I already had a fuel supply problem for the fourth time in a short time. As soon as the diesel sinked at a certain level in the tank (board computer showed residual sprite for approx. 240 to 280km) the engine switched off with the message “motor maintenance required”. Tank felt and errors away. A diesel filter exchange did not bring any improvement. Why did it always happen at similar fuel level? I suspected pollution in the tank and removed the tank, but in the tank There was no dirt to see. I removed the diesel residue and cleaned the hoses on the tank with compressed air and renewed the diesel filter for the second time. Now it seems to be OK again. The tank splits into two halves. Does anyone know what principle the tank works according to? Where could I read it. thank you for your contributions