What is the function of the two middle lights in the headlights of the Mercedes-Benz S400?

[BenjaminDella]

The two middle lights in the headlights of the Mercedes-Benz S400 are active infrared emitters. Night vision function of the S-Class: The night vision function of the S-Class uses active infrared, not passive infrared like other models, providing clearer and better results. At night, the function only activates when the vehicle speed exceeds 30 km/h. Principle of active night vision illumination: The Mercedes-Benz enhanced active night vision system first emits near-infrared light to illuminate the detection target, then captures the reflected infrared light through an infrared camera installed on the windshield. This provides significant safety benefits during nighttime driving.