You guys are going to laugh at my super rigged set up. But it works perfectly.
I have an old Sirius XM radio from almost 10 years ago that connects to the back of the my car radio's antenna plug. It kicks out any signal that isn't coming from the Sirius XM radio.
Since I don't actually have a Sirius XM subscription, I took apart my center console and hid it in the large divided spaces. It turns on when the car starts, and that's enough control I need from it.
The Sirius Radio has an AUX port so I use a AUX cord extender to the arm rest/storage area. Under the arm rest I have a 3-way DC splitter. One powers the Sirius radio, the other powers my phone, and the last one charges my Bluetooth Receiver's battery.
With only the Bluetooth Receiver visible and velcroed to the arm rest, I'm able to use my entire setup with just one button press.
SCIENCE!
Here's the BT receiver I have. Its a little expensive but it claims a 12 hour battery. It's nice to be able to unplug the power when I'm listening to some podcasts. I can hear the engine noises through the speakers when it's using power from the car.
Edit: Forgot to add the BT Receiver I use
http://www.bestbuy.com/site/alurate...-audio-receiver-black/6581843.p?skuId=6581843