Originally Posted by Pseudo Nim
You can't. This is not supported. You either have to rewire, or manually switch your headlights to "parking" (one click to the right of 0) - that's the poor man's way out (and that one allows you to turn on fogs w/o turning on xenons, UNLIKE the 'A' option).
Are you sure? There may be a way by messing with the "wert_" options.