OBD interface to activate AUX input on Audi MMI 3G After coding, the AUX option will be available in the Media menu of the MMI 3G Perfect for integrating a Car Play interface or an external navigation system Suitable for the following vehicles: Audi A4 8K Audi A5 8T Audi A6 4F Audi A8 4E Audi Q5 8R Audi Q7 4L Package includes: Coding dongle Note: The AUX connection must always be plugged into the control unit, usually via a wiring harness from the accessory manufacturer