Specific Xenon adapter for switching from halogen headlights to HID Xenon headlights for Audi A4 8K and Audi A5 8T High-quality adaptation Only one set is required for both headlights Scope of delivery: Xenon adapter Notes: The added single wires must be connected to the control unit of the on-board power system in order to release the Bi-Xenon switch The compatibility of the vehicle control unit must be checked beforehand Article 47266 is also required for US vehicles Please keep in mind that in some countries it is prohibited by law to use HID headlights without automatic leveling We also offer the wiring for the headlight washer/wiper system if desired or required