THERE IS A SPECIAL MACHINE, WHICH SMALLER GARAGES DO NOT HAVE BECAUSE OF THE EXPENSE, WHICH PLUGS INTO SOMETHING IN THE ENGINE WHICH RESETS THE INFO FOR ANOTHER YEAR. IT IS ALL DONE THROUGH A SPECIAL LAP TOP SET UP. MY GARAGE HAS A MAN COME ROUND TO FIX THIS WHEN HE HAS ENOUGH CARS TO WARRANT HIM COMING.
CHRIS, January 2009