Computer switch says PROG

[Stevo96]

Hi,

I've only owned my X5 for 3 weeks so im still learning, im trying to get my average fuel consumption up on the dash, I can toggle through the different displays but I can't seem to clear whats there, i.e when I press and hold in the switch it just says PROG? What am I doing wrong or is it kaput?
I know thw stereo also displays this info but my pixels are shot.
Car is a 2002 3.0i, no DSP. Standard stereo 6 speakers.
Cheers