Reset service light on Volvo S/V40

1. Simply insert the ignition key, turn to position 1.

2. Hold down the reset mileage stick on the instrument panel.

3. While holding it down, turn the key to position II (on) but don't start
it.

4. While still holding the stick down, after about 10 seconds, the service
light will flash.

5. Release the stick after 3 flashes. If successful, there will be a short
beep and the light will go out.

It is as simple as that! It may take a few goes to get it right though, as
the 3 flashes bit seems to be fairly important.