If you want to save some money...you can install the button in the stock panel.
There is a guy in the Touareg forum that sells the buttons and the wire harness from the button to the Kessy module.
If you use the chrome Phaeton button, it is plug and play after cutting the hole. I used the Touareg button and had to modify it so the words weren't upside down.
I think it is a much cleaner look than having the dummy airbag switch on the euro panel. And again..much money saved this way.