Quote:
Originally Posted by GregW / Oregon
These are cornering lights or "corner-illuminating lights". These are in addition to the adaptive headlights.
From the manual, "In tight curves at speeds up to approx. 40 mph/70 km/h, e.g. on mountainaous roads or when turning, an additional corner-illuminating lamp is switched on that lights up the inside area of the curve." On many new cars the fog lights do this, but since the M3 doesn't have fog lights...
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The cornering lights also turn on whenever the lights are on and the car is put in reverse, regardless of speed. Seems to be an undocumented feature.