How do i Reset service light on1997 Volvo 850?

To reset the service light on a 1997 Volvo 850, turn the ignition to the "II" position without starting the engine. Press and hold the "Trip" odometer button until the service light begins to flash, then release the button. Press and hold the button again until the light goes off. Finally, turn the ignition off and then back on to ensure the service light has been reset.