I ran into this recently also, after looking, no I do not believe there is a way to completely turn off the lights. By default I believe when you rotate the knob all the way to the left, what one would assume was off, this still leaves the DRL on. In the menus under lighting there is a selection that simply says Daytime Running Lights, you can turn it on or off. What I found was that with it on the DRL and low beam headlights remain on in the "off" setting. If you deselect the Daytime Running Lights in the off position the low beam headlights are no longer on. Could be different in other trims and other years but that is what I have found messing with mine.