I would like you to test that :

- Go into the car, put the key (not start the engine).
- Reset "Travel computer" and "On board computer" (so, all data are erased).
- Now start engine, for few minutes (10 or 15 minutes), but don't move the car.
- And now, you can go for a ride.

You'll see MPG is not the same on the "TC" and the "ODB" !
I think it's strange, because they were "0.00" before moving the BMW.

I'm not sure. If someone can try this method.

It's hard for me to say what i want !!! i hope you understand me !