Corresponds to TUNE in the centre console.
When using the remote control, first press the remote control's button 
to position F. Then aim the remote control at the IR receiver, which is located to the right of the INFO button in the centre console.
Warning
Keep loose objects such as mobile phones, cameras, remote controls for accessories, etc. in the glove compartment or other compartments. Otherwise they may injure people in the car in the event of sudden braking or a collision.
Note
Do not expose the remote control to direct sunlight (e.g. on the instrument panel) - otherwise problems may arise with the batteries.