To change the cruising speed

See also:

Service mode
In service mode, the remote start function is temporarily disabled to prevent the system from unexpectedly starting the engine while being serviced. ...

Display selection (type A, B and C audio)
If you press the “TEXT” button during playback, the display will change as shown in the following sequence. For CD-DA: For MP3/WMA/AAC: For iPod®: ...

Speedometer
The speedometer shows the vehicle speed. ...