Does any one know if the sensitivity of the sensor that turns on the headlights when the light switch is in auto mode is adjustable? My xenon lights come on at ambient light levels that do not require headlights. It would be nice to adjust the sensitivity so that they come on later at lower outside light levels. Since the replacement of burned out lights is no longer covered I would like to use them only when I need them. Of course, I can turn the lights off but then the dashboard lights go out.