once the engine is running, press the information button until it says "service due", then keep the button pressed. "service due" will now flash, keep the button pressed, then the new "miles to next service" will be shown, release the button and it's now reset.
hope this helps
I tried this on an 05 megane and it did not work.In additon you must press a small button next to 150mph on the speedo until it blinks and cleers instead of keeping the button pressed.
good luck
tracey
August 2010