The headlight lever can be found on the left side of your steering wheel.
The outermost switch should always be set to AUTO as shown in the photo below. This means that the headlights will turn on whenever it gets dark and turn off automatically when you drive into a bright area.
To flash the high beam: Pull the lever towards you.
To keep the high beam on: Push the lever away from you.
To turn off the high beam: Set it back to its original position.