See also:

Dimensions–S60
...

Operation
Chassis settings Use the buttons in the center console to change setting. The setting in use when the engine is switched off is activated the next time the engine is started. ...

External audio source volume
If an external devices such as an MP3 player or an iPod is connected to the AUX socket, the device's volume may be different from the volume of the internal sound sources such as the disc play ...