How can I pair my phone with my car?

Terry wants to pair his car with his Android phone, but he's wondering how he can unlock his phone when he's driving. Leo says that starting with version 5, Android will automatically pair with the car as a trusted device and unlock the phone, putting it into "Auto Mode." What if it doesn't recognize it as a trusted device? Leo says he should be able to add it in settings under "Smart Lock." He'll need to be paired to do it.