How do you turn off the service warning light on a Vauxhall Vectra?

1.With ignition OFF,press and hold reset button.(trip mileage,although I believe time clock on some). 2.With button still held in,switch ignition ON while continuing to hold down button. 3.After 2 seconds,InsP should flash then change to ----. 4.Release button and display reverts to trip miles.(or time?) If a Vectra "C" with Eco-flex service intervals it's slightly different. 1.Ign OFF,trip miles must show. 2.Press and hold the reset. 3.Ign ON,still holding reset,wait until service interval indicator switches over and hold on for 3 secs more. 4.After 3 seconds,the display on the instrument cluster shows the max mileage allowed between services and the timer is reset for 24 months.