OBD interface for commissioning / coding or parameterization of the control units of the Audi A4 8W Matrix LED headlights Simply connect the adapter to the vehicle's OBD interface - done! The interface parameters the headlights fully automatically Suitable for the following models: Audi A4 8W with control parts with 4M0907397AD (addresses 29, 39), 7PP941571BC (addresses D6, D7) Scope of delivery: 1x coding dongle for OBD Note: To be used only in connection with the retrofitting of the corresponding automatic headlight adjustment system (aLWR) Please read the part numbers from addresses 29, 39, D6 and D7 per diagnosis and compare the part numbers. The coding adapter can only be used for one vehicle Other vehicles and part numbers on request