Does anyone know what the algorithm used for the 'time to take a rest break' warning is that appears on the dash? I just did a 2800 km road trip and received this warning twice. I have seen it several other times when just driving around town here. I can't figure out what causes it to appear - it seems to happen for no apparent reason. I also reset the trip 1 and 2 meters after filling with gas which resets the timer but that doesn't seem to influence the warning. On this last trip, I drove for almost 5 hours, stopped and refueled (reset the trip 1 meter) and then had lunch so 1 hour rest in total. I got back on the road and 1 hour later I got the message 'time for a rest break'?