I am used to drive with my headlights (low beam, rear lights) always on. My Volvo, SAAB and Mazda had it like this by default. As soon as you turn the ignition on, the lights where on. I personally don't like the daytime running lights because the rear lights are not on, which makes no sense. And in the Model S, apparently the front and rear fog lights are inoperative if you don't have the low beams on! That is very stupid. I like to use my rear fog lights for signalling if I have to. And I want to have my rear lights on all the time while driving. In my old Mazda RX-8, it was a simple relay that the dealer installed to achieve this. How can I do this in the Model S?