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