AFS is the adaptive front lighting system. With it, our xenon headlights swivel towards the direction the car is traveling (don't recall what the speed threshold is).
You can much more easily notice this effect when it's very dark outside. If you turn at an intersection, you may catch a glimpse of your headlights going back to their forward/straight position at the end of the turn. Or if you're going straight slowly enough to be safe and on an empty road, just turn your steering wheel left and right, and you should see the low beam moving side to side.
EDIT: here's a generic video about it:
https://youtu.be/mN12Ruex3m0
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