You have to unsolder your dual climate comtrol button from your board and solder it onto the new controller. It's not very difficult. Then you move the button cover from the old AC controller to the new AC controller. I did it to mine. The button won't light up unless you also move the LED, but it doesn't bother me. There is a how to thread somewhere on here of someone doing that.

Don't waste your time going with a single DIN. you will still have to move the dual climate button.

 

If youre interested, I have the barely used Kappa components for sale. They are 2ohm...