Complete automatic retrofit kit for upgrading from halogen to bi-xenon for Audi TT 8N, TTR Selectable options: Front-wheel drive Quattro Scope of delivery: Wiring Control unit Mounting plates, sensors Notes: Once After installation is complete, the sensors must be recoded via diagnostics In addition to xenon headlights, you also need headlight washer jets. This option is often supplied with the factory winter package