Giel,
Welcome to MVS.
I believe that on your car you do the following:
1. Push in the trip odometer reset button.
2. While continuing to push the button in, put your key in the ignition and turn it to position I and then to position II.
3. When you hear a beeping sound or see blinking on your dash/instrument cluster, turn loose of the button and turn your key back to position I and pull it out.
Your service message should now be turned off.
Let us know if this worked.