Unfortunately, that's not the case with the Leon; it's different. Channel 3 is not assigned to anything. I also don't know how to fix it, and I'm looking for a solution myself.
Let's revive this thread. My car is a Sharan from 01/01, and I also don't have channel 3 available. Therefore, I can't adjust the fuel consumption display.
Does anyone know anything about this? Mine is showing 5% too much, which is annoying.