Found it on the Internet. Follow steps: 1. Ignition on 2. Press the reset menu button until the service interval is displayed 3. Repeatedly press the step button until the desired service interval is displayed 4.Press the C/T button until the display changes 5. Press the step button until YES appears ( I didn’t get this ) 6. Press the C/T button then switch the ignition off. The service interval should now be set to whatever you selected, I chose 10000 Kilometres which is roughly 6000 Miles but there were quite a few to choose from. Hope this helps someone else with the same problem as I had, and thanks once again to Semmysonic. Cheers, Paul