Since I have an Audi A6 as a rental car at the moment, I noticed the following in the coming home- leaving home function. The function is actually the same as in the Phaeton. Only the front fog lights are turned on with the Audi and not the Xenon. At the Phaeton the xenon headlights always start although the front fog lights are installed. Has this always been the case? Is this function coupled with a light sensor? The Audi activates this function only in the dark, the Ph aeton with me always. Link to the Volkswagen homepage:http://www.volkswagen.at/rund_um_vw/innovation_technik/technik_lexikon