Audi a4l mobile phone communication error 8

Hello, communication error between Audi a4l mobile phone and car. If the communication error between the car Bluetooth of Audi A4L and the mobile phone is 8, the specific operation steps are: 1) First, turn on the Bluetooth of the mobile phone you want to match; 2) Open the vehicle and press the multifunction key until the indicator light emits blue light; 3) Use the car Bluetooth to find the Bluetooth of your mobile phone, or you can search the car equipment through your mobile phone; 4) Set the Bluetooth mobile phone to search for Bluetooth devices according to the operation method of the mobile phone instruction manual. Usually, the setup step includes entering the settings, connection or Bluetooth menu on the mobile phone, and then selecting the option of discovering Bluetooth devices. 5) After the search is successful, the current device name will be displayed and you will be asked if you are ready to dock with it. Press "Yes" or "OK" to dock. 6) After connecting the device, enter the password: "0000", and then press the "Yes" or "OK" key. 7) The connection is successful. If there are still mistakes, I suggest you go to the 4S shop. Thank you.