Stalk switch rotating ring in AUTO position.
With the stalk switch's rotating ring in position, dipped beam is also activated automatically if the rear fog lamp is activated.
With the stalk switch's rotating ring in the position, dipped beam is always activated when the car's electrical system is in ignition position II.
The car detects when it is driven into a tunnel and switches from daytime running lights to dipped beam.
Note that the rotating ring in the left-hand stalk switch must be in mode for tunnel detection to work.