I've been wanting to do this to my Explorer for a while. It doesn't make anysense to my why my XLT (mid level) Explorer has no heated mirrors (only available on the Limited model) yet my GL Contour had them as standard equipment.
Also from my observation the areodynamics of the mirrors on the 'tour seem to prevent a lot of crap (read snow) from building up on the mirror, yet on the Explorer the mirror seems to be a magnet to the stuff.
