There is a jumper plug connector that's on the circuit board, remove that black connector and 2 metal pins will be visible. The machine should now be calibrated in KM. Keep the connector incase you want to revert back to MILES. Just plug it over one of the pins so it's not connecting both pins together. I've got images that show this, please reply to this thread and I'll be happy to post them up.
Saqib Barlas, December 2014