Complete automatic retrofit kit for upgrading halogen headlights to xenon headlights for Audi A6 4F Item numbers 36991-2 and 36991-3 are only suitable for vehicles from model year 2009 Selectable options: Bi-xenon, air suspension not available Bi-xenon, air suspension available Cornering light with DTRL LED, air suspension not available Cornering light with DTRL LED, air suspension available Bi-xenon with DTRL LED, air suspension not available Bi-xenon with DTRL LED, air suspension available Cornering light ASF, air suspension not available Cornering light ASF, air suspension available Scope of delivery: Wiring Xenon adapter Control unit Leveling arm, mounting plates, sensors, screws* Notes: Please indicate equipment above (info - DTRL = daytime running lights, ASF = adaptive front lighting system) * not for the following item numbers 36991-4, 36991-5, 36991-6 and 36991-7 Once the 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 winter package from the factory The control unit may come from test vehicles and have undergone a thorough functional test In most countries, the retrofit system is required by law in combination with xenon headlights