KUFATEC Coding Key Interface for final coding, if original bi-xenon headlights have been retrofitted to the VW Amarok 2H Simply connect the adapter (coding key) to the vehicle's OBD interface - done ! The interface automatically adapts the retrofitting to the existing vehicle coding Scope of delivery: 1 coding key Note: Xenon headlights can only be retrofitted on vehicles with the vehicle electrical system control unit 7H0937090X On certain vehicles , replacement of the electrical system controller (BCM1) is necessary The diagnostic interface can only be used for one vehicle