Have you pushed in the knob sticking out of the cluster to change the what is displayed? Heh, yep. Ive tried that and it still doesn't show me the average fuel use. When I press that button, down the bottom on the screen it changes to TRIP A (and the number of K's I have done whilst on trip a). I press the button again, it shows TRIP B (and the number of K's I have done on trip B). When I press it again, it goes back to showing my total K's. I might have to get some photos of it.