The lights are usually set to AUTO. They then switch on automatically in the dark or in a tunnel.
Want to control them yourself? The light switch is a rotary dial on the dashboard, to the left of the steering wheel. Turn it to position lights or dipped beam.
High beam: push the stalk to the left of the steering wheel away from you. Pull the stalk towards you to flash the high beam.
Switching on the rear fog light: switch on the dipped beam first, then press the fog light button by the light switch.
Switching off the rear fog light: press the button again or switch the lights off.
Set the lights back to AUTO when you end your trip.