Originally Posted by BleedingPurist
Keep in mind that if you choose to use Bluetooth to connect to your car stereo that you are likely giving up voice input to the phone. When I use Bluetooth in my car I am unable to use S Voice or Google Voice Input... both tools that come into play when you are driving. I'd make sure that direct line aux input is an option in any car. I switched to that primarily for this reason.
On my Acura when I used Siri on the iphone 5, it stopped the music and did the beep in the speakers and used my mic on my car to listen. Worked great. I hope this isn't a downgrade on the phone with the way it works with my car.