See also:

Displaying radio PS (Program Service Name) and RT (Radio Text)
...

Audio control buttons (if equipped)
Type A audio Type B audio These buttons are located on the spokes of the steering wheel. They allow the driver to control audio functions without taking his/her hands off the steering wheel. ...

Setting the playing speed (only when the audiobook is playing) (type D audio)
Each time you briefly press (the “RPT” button) while the audiobook is playing, the playing speed changes in the following sequence. ...