KUFATEC diagnostic interface: Interface for final coding, if original LED headlights have been retrofitted on the VW Arteon 3H suitable for retrofitting headlights with cornering lights (DLA) Simply connect the adapter (dongle) to the vehicle's OBD interface - done! The interface automatically adapts the retrofit to the existing coding of the vehicle Scope of delivery: coding dongle Note: The diagnostic interface can only be used for one vehicle