Hi
if its the service indicator on the instrument panel thats illuminated (usually a spanner symbol) follow this proceedure.
with ignition switched off.
press and HOLD the mileage trip button.
switch ignition on. the display will count down from 10 to 0.
release mileage trip button.
switch ignition off then on and it should be ok. this works with most european vehicles.
peter grant, February 2010