Wiring harness for automatic retrofitting from halogen to bi-xenon or adaptive lighting A xenon adapter as well as components (depending on factory equipment) for self-leveling are also required Selectable options: (Bi-Xenon) Audi A4 8K, A5 8T, Q5 8R up to model year 2009 (Adaptive lighting) Audi A4 8K, Q5 8R up to model year 2012, Audi A5 8T up to model year 2011 (Bi-Xenon) Audi A4 8K, A5 8T, Q5 8R from model year 2010 Scope of delivery: Wiring harness Notes: After installation, the sensors must be recoded via diagnosis Please check in advance whether the control unit of the central electrics supports coding for xenon or not