A2.
(a) Click the Android Auto icon on the car stereo's main menu.
(b) First, turn on Wi-Fi and Bluetooth on your phone. Pair a new device, find the Bluetooth name "CarKit-xxxx" in the list, and click to pair (if a PIN code is needed, try 0000).
(c) A prompt to "Pair with CarKit-xxxx" will appear on your phone; please click "Pair."
(d) Another prompt asking "Allow access to messages?" will appear; please click "Allow." The stereo will then automatically enter the Android Auto interface. When powered on, the stereo will attempt to reconnect to the last connected phone automatically.