Complete automatic retrofit kit for retrofitting from halogen to bi-xenon / adaptive lighting for Audi A4 8K Only suitable for original headlights The necessary xenon adapters are already part of the delivery The following options are available: Up to model year 2009 From model year 2010 Up to model year 2012, corning lighting Scope of delivery: Wiring Xenon adapter Control unit Leveling arm, mounting plates, sensors Notes: On vehicles with a chassis number of WAUZZZ8K***164000, please use item number 36989-1 After completing the installation, the sensors must be recoded via diagnostics Please check in advance whether the control unit of the central electrics accepts coding for xenon or not In most countries, the retrofit system is required by law in combination with xenon headlights.