Side Mirror Defrost upgrade

[MoladoGuy]

I have power mirrors and I was under the impression that the defog/deicer addition is just an add-on?

Does anyone know if I can add it to my current side view mirrors?

 

[Se7enLC]

I have no idea if it's seperate - my mirrors just came with it, there's no button or anything, just a little wavy-line symbol on the mirrors, and they melt the ice automagically