how do i shut off the AFS warning light and what its functionality

The automatic front lighting system (AFS) is malfunctioning. You may be able to navigate to a setting to turn the system "off", but in either case, you'll need to have testing performed to find out what's going on. The AFS system is a dynamic system where the front headlights illuminate actively depending on the direction driven and steered. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops