See also:

Setting
Pull the switch. The LED lights up. The indicator lamp lights up red. The parking brake is set. Lower lamp: indicator lamp in Canadian models Set the parking brake and further secure ...

Releasing
Raise lever slightly, press the button and guide the lever down. ...

Selecting a channel
You can only listen to enabled channels. The selected channel is stored for the remote control currently in use. Via iDrive1.  "Radio" 2.  "Satellite radio" 3.  ...