iPad 2 bluetooth connect to car stereo

How can I connect iPad 2 to car stereo using bluetooth? I can do it with my iPhone.Bluetooth protocol on the iPad doesn't support HandsFree, and the iPhone does. iPad is just music which is Bluetooth 2.0 A2DP, so you need a Bluetooth 2.0 A2DP sound system. But you can play the iPad through iPod adapter in the car.