How can I charge and output audio from iPhone 5 in a car?
My 2013 Ford Ranger (the T6 international version) has an audio system with a USB port on it, and it plays audio through that regardless of whether it is the old 30-pin connector or a Lightning connector on the other end. When I plug in my iPhone, it says "Connecting iPod" on the audio screen. It also supports audio over Bluetooth.

(When saying "in a car", please be a little more specific about the car and/or its audio system. They are all different)