I was messing around with this yesterday. Stationary with the ignition on, cycled through the display until i got to the speed warning (set at 75). Held the reset button on the underside of the stalk for a couple of seconds.. nothing happened. Let go and tried it again, then did some doublejointed ninja move to click the up/down button at the same time, and when i let go this time.. the speed had been reset. Then just clicked it up to 85mph and pressed 'ok' again. I really doubt that's the right way to do it, it was probably lotto but it worked for me.