When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps come on automatically.

There is a light sensor on top of the instrument panel. Do not cover the sensor; otherwise the headlamps will come on when they are not needed.
The system may also turn on the headlamps when driving through a parking garage or tunnel.
When it is bright enough outside, the headlamps will turn off or may change to Daytime Running Lamps (DRL).
The automatic headlamp system
turns off when the exterior lamp
control is turned to
or the
ignition
is off.
Lights On with Wipers
If the windshield wipers are activated in daylight with the engine on, and the exterior lamp control is in AUTO, the headlamps, parking lamps, and other exterior lamps come on. The transition time for the lamps coming on varies based on wiper speed. When the wipers are not operating, these lamps turn off.
Move the exterior lamp control to
or
to disable this feature.
Daytime Running
Lamps (DRL)
Hazard Warning FlashersElectrical Center Identification Views
Figure 1: X50A Fuse Block - Underhood, Bottom ViewFigure 2: X50A Fuse Block - Underhood, Top ViewFigure 3: X50A Fuse Block - Underhood X1Figure 4: X50A Fuse Block - Underhood X4Figure 5: X50A Fuse Block - Underhood X6 (LEA)Figure 6: X50A Fuse Block - Underhood LabelFigure 7: X51A Fuse Block - Instru ...