How do i change the OBC to US specs?

[BDK]

you can push the "1000" and the "1" buttons at the same time and together and it will give a pretty good reading of how much gas is actually left in the tank....
if it is still in the default euro mode, just divide the number showing (liters) by 4 and that will still give you a small buffer to fall back on since there are really 3.8L/gal....

[monoaural]

you can push the "1000" and the "1" buttons at the same time and together and it will give a pretty good reading of how much gas is actually left in the tank....
if it is still in the default euro mode, just divide the number showing (liters) by 4 and that will still give you a small buffer to fall back on since there are really 3.8L/gal....

You can make that into gallons too? Is that what the switch on the back is for?