[apswater]

All you need to do it get the OBC turned on. You don't need anything else for temperature. If you want the other features, you can add upgrade the blinker stalk to 4 handles (assuming you have cruise control) and add some wires and get full on board computer control. You need to find someone with a programer because the dealer usually wont do it for you since it was an expensive option. I did the full mod on mine and added cruise control at the same time.