Hi John,

It should be possible. Put the key card into the car’s slot and hold down the top button on the right-hand column stalk while you press the start button at the same time. A message should tell you to remove the key card, whereupon you stop pressing the stalk button. Then hold this button down while pressing the start button again – if you’ve done it right, the km/h or mph logo should start flashing; keep both buttons pressed until the speed measurement unit changes to the one you desire. To change the car back, you have to repeat this process.