My car (2007 C320 CDi sport) has this option fitted, and I was wondering exactly what it does? The manual doesn't really explain it, even the original glossy sales brochure I have for the car is a bit thin on information! My last car a BMW E92 coupe had the adaptive headlights, which would 'turn' the beam as you turned the steering wheel, and was very noticeable (and useful) the cornering function was a bulb in each headlight that fired it's light sideways to illuminate the kerb, at slow speeds, or when the indicator was activated (not very often being a BMW!!!) The Mercedes ILS doesn't seem to work as good? I have checked it is turned on, in the instrument cluster option. The only thing I can notice is the fog light lighting up as a cornering aid.