I emphasise CONTROL because pug has an air con button. I have heard people say it is too expensive/difficult/ just not worth retrofitting air con to a car but I would like to swap the single button one with a digital control. The interface even fits in the same slot but would there be extra parts? I'm guessing some kind of control unit to increase/decrease temperature as it's currently just a button and manual rotate switch.
I would really appreciate any feedback or experience.