I would Suggest to can the air filter, oil filter, oil and spark plugs before you do this as it would run better and very easy to do youself cost about £50 for parts
Make sure your car is running.
Press the button on the right hand stalk (trip computer button) until the 'CHANGE OIL SOON' message is on the display. Then press and hold this button and whilst still holding it press and hold the small button on the instrument cluster for about ten seconds. When you do this, the display will start to flash. Keep pressing both buttons until the display stops flashing and displays next service 18000 miles and the your SERVICE light and change oil soon as gone off. GOOD LUKE
PEZ, April 2010