Just got back from a ~500mi round trip to NYC. I just rolled past 5K miles on the odometer on the return leg. On the way up, my dash locked up. No speedo or energy needle activity. No activity on the nav or energy meters currently displayed on the side panes. No response to steering wheel controls. Had to reboot it. I was about 150 mils in to the trip, and did nothing different (that I can tell) than what I had been doing for the previous couple of hours. After the reboot, all was fine (except the odometer seems to disappear after a dash reboot, but comes back next time you power the car back up). Only time I've sever seen that.