I've just picked up a 6 month old A3 yesterday. I've noticed the trip computer isn't working as I expect. I drove to work this morning and parked up and then about 4 hours later went back out and noticed that trip computer 1 still had the values from my morning drive. The strange thing is I'm almost certain it was resetting yesterday after it was left for a while so I'm worried that while I was playing in the menus on the DIS last night I have inadvertently set something causing this but I can't find any reference to anything that controls it. Any ideas?