Thanks for the info, @esbernard! If you're still having trouble connecting to your vehicle.
Let's begin with some troubleshooting steps:
Try re-pairing the connection between your car and the phone. To remove the pairing, please go into the Bluetooth settings menu on your phone, find the appropriate connection, and select "Forget this device." Once you've done so, refer to your car's manual for the steps to reconnect the car system to your phone. Using the Voice Commands for your unit (if available) is often the easiest way to do this.
Second, can you confirm that the Launch from car* setting is enabled on your phone?
Open Pandora.
Tap Profile.
Next select the Settings gear in the upper right corner.
Then tap Advanced.
Under Bluetooth for devices make sure there is a check next to Launch from car.
... View more