Specific wiring for upgrading Bi-Xenon headlights with automatic headlight adjustment for Audi TT 8N This wiring set connects the headlights to the front and rear level sensors as well as to the central electrical connection Scope of delivery: wiring set cables Notes: 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 factory winter package In the In most countries, the retrofit system is required by law in combination with xenon headlights