On 2001 nav screen, hit menu, go to on board computer, go to speed, hit button twice. This gives you average speed, (really speed at that moment and then average speed from that moment on). Set cruise control to 60 (or any speed), hit button twice and your digital speed will show on nav screen. Hit the button twice again and it will reread your digital speed. This way you can easily check your speedometer for its true speed as often as you want. My analogue speedo is 2-2.5 mph lower than the digital @ 60mph. Is 2000 nav the same? Seems I remember Greg I think talking about converting meters etc. I'll have to search.