Hi,
I've been trying to research the feasibility or retrofitting the auto headlights switch (on at night, off during the day) into a 2009 A4 (that obviously doesn't have them now).

Does anyone know what all's involved in this? Some older posts talk about the auto dimming mirrors and auto wipers tied in, but that was in earlier models. I'm assuming it's more than just a switch replacement, but who knows?

Thanks in advance for any advice.

-jim