like the title says...anyone retrofit auto-on headlights...i miss that feature from my last vehicle and wish my audi had them...what would it entail besides replacing the switch to a switch with the auto function on it?

on a side note - if i get my car vaged to have the drl's on, can i have my headlights operate as my drl's? if yes will my taillights be on as well? i could just do this to fix my problem (i would just have my lights on all the time), but i would be worried that if the taillights didnt come on with the headlight drl's i would forget to turn the "real" lights on and would drive around at night without taillights...