May be the same as mine on my Peugeot its worth a try.
Using the tripmeter button ie one used to display full mileage or for a trip to discover how many miles you did and how much you paid the government for the fuel.
Switch off your ignition.
Press and hold the tripmeter button
Still holding the trip button turn ignition back on and hold the button for 10 seconds.
if it is the same it will count down to zero and the service warning should disapear.
Rob
June 2008