adding/ installing dimming side mirrors

[coolesnce]

When I bought my 2005 4.4 X5 It was suppose to come with dimming side mirrors, but only came with a dimming rear view mirror. I want to add the dimming side mirrors. Does anyone know if I need to run any wiring to the mirrors, or is the wiring already there and I just need to replace the mirrors? The dealer told me not to bother since it would cost around $2000 to retrofit the 2 side mirrors. Does that sound right?

[UCrewX5]

I'm guessing that the necessary wiring is probably there. See TripleX5's retrofit of the auto folding mirrors to give you an idea of what's involved in a project such as this - http://www.xoutpost.com/articles.php?...icle&artid=111