Specific Xenon adapter for switching from halogen headlights to HID Xenon headlights for Audi A6 4F High-quality adaptation Only one set is required for both headlights Selectable options: up to model year 2008 from model year 2009 Contents of Delivery: Xenon Adapter Notes: The added single wires must be connected to the on-board power system control unit in order to release the Bi-Xenon switch Please keep in mind that in some countries it is forbidden by law to use HID headlights without automatic leveling