Introduced to the high end vehicles around year 2003, the AFS differs from Auto-Leveling that moves up and down, instead moves the headlight beam left / right to help driver see the upcoming curved road better. Rather than the mechanical linkages employed in earlier directional-headlamp systems, AFS relies on electronic sensors, transducers and actuators. Other AFS techniques include special auxiliary optical systems within a vehicle's headlamp housings. These auxiliary systems may be switched on and off as the vehicle and operating conditions call for light or darkness at the angles covered by the beam the auxiliary optics produce.
A typical system measures steering angle and vehicle speed to swivel the headlamps. The most advanced AFS systems use GPS signals to anticipate changes in road curvature, rather than simply reacting to them. To know whether you have AFS system or not, you can see if your headlight beam moving left / right when you change the direction of the steering wheel, but again that is not 100% scientific, so the best way is actually call to any dealer and give them your VIN number and they will be able to let you know if you have stock equipped AFS headlight or not.