We just got a new-to-us W203 with these automatic high-beam headlights. They are fantastic!
In normal use, the bulbs are angled down for normal headlights. Above a certain speed, the high-beam lights are automatic. If it's dark and there's no traffic ahead of you, the lights angle up, extending the illumination range. When there's oncoming traffic or you get close to a car in front of you, the lights tilt down to the normal beam position. This happens automatically, faster and more reliably than you can flip the switch.