I have programmed using the Bimmercode app to increase the fuel tank capacity but I cannot still fill beyond 1.9 gallons (US). Can anyone shed some light on this? I haven't tried the expert mode as I am afraid I will simply screw it all up
I just bimmercoded mine and showed that I had a quarter tank left. I went to fill it up with non-ethanol fuel and put 7.75 litres in. Seems to be working on mine. I didn't go into the expert mode as I too am afraid of messing it up. Ours came from California and I still need to take it to the a local BMW dealer to see if I can get an extended warranty. I wont want to venture into the expert mode until that is sorted out.