KUFATEC diagnostic interface: Interface (coding dongle) for final coding when retrofitting the original LED headlights on an Audi Q7 4M 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: Diagnostic interface Note: The diagnostic interface can only be used for the compatibility of a single vehicle Check the on-board control unit Headlight calibration must be carried out according to the manufacturer's specifications Only suitable for vehicles up to model year 2019