Hej people! The lack of accuracy of the on-board computer was often a criticism point. Especially it concerned the average consumption. By and large, I had to detect occasional deviations, but which remained within the frame (deviation +/-0.2 liters at most compared to manual calculation). In winter, of course, due to the auxiliary heating, no exact measurement by BC was possible. I would like to neglect this situation here. The subsequent refueling in connection with my “Ultimate test” I had to find horribly that the BC shows a difference of +0.7 to -0.4 compared to the hand calculation. I find that quite wrong! Now my question. What concrete experiences regarding the deviation BC/hand calculation could you find so far?