OBD interface for final coding when retrofitting the original LED taillights on the Audi A4 8K Avant Simply connect the adapter to the vehicle's OBD interface - done! The interface automatically adapts the retrofit to the vehicle's existing coding Selectable options: LED to LED facelift Standard US to LED facelift EU Standard to LED facelift Scope of delivery: 1x coding dongle Note: Only suitable for vehicles up to model year 2012 The coding adapter can only be used once Not suitable for left-hand traffic 38982 and 38982-1 are not suitable for US vehicles