Specific wiring for upgrading bi-xenon headlights with automatic headlight height adjustment for VW Golf 4 after 08/02 This cable set connects the headlights to the rear and front level sensors as well as to the central electrical connection Scope of delivery: Cable set Notes: After installation, the sensors must be recoded via diagnosis In addition to xenon headlights, you also need headlight washer nozzles. This option is often supplied with the factory winter package In most countries, the height adjustment system is required by law in combination with xenon headlights