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You have correct setup Bluetooth on both your phone and car, but the phone, Google Map Navigator and media audio don't have sound when driving. Please refer to this page for reasons: Google Map doesn't have sound when driving - Step by step with Screenshots
One of resolutions is downloading a free apps such as Mono Bluetooth Router.
After turn on the Mono Bluetooth Router, make sure the Bluetooth connects to phone and media.
When the phone rings or media plays, you should see the Active call show on the car. You are good to go.
