Specific wiring harness for Bi-Xenon headlight retrofit with automatic headlight adjustment for Audi A4 B6/8E This cable set connects the headlights to the front and rear level sensors as well as to the central electrical connection Scope of delivery: Cable set Installation instructions for download Notes: After installation, the sensors must be recoded via diagnostics In addition to the xenon headlights, you also need headlight washer jets. This option is often supplied with the factory winter package In most countries, the retrofit system is required by law in combination with xenon headlights