Tesla MODEL X 2015 Owner's Manual page 155

Media
Your Bluetooth device begins playing the audio file that
is currently active on your device. If no audio file is
playing, use your device to choose the audio file you
want to listen to. When the chosen file begins to play,
you can then use Media Player's next and previous icons
(or use the left scroll button on the steering wheel) to
play other tracks.
NOTE: To play media from a Bluetooth-connected
device, ensure that access to the device's media is
turned on (see Pairing a Bluetooth Phone on page 156).
Using the Touchscreen 153