To adjust the volume

See also:

Headlamp levelling switch (except for vehicles with discharge headlamps)
The angle of the headlamp beam varies depending on the load carried by the vehicle. The headlamp levelling switch can be used to adjust the headlamp illumination distance (when the lower beam is il ...

How to make or receive hands-free calls
You can make or receive hands-free calls using a Bluetooth® compatible cellular phone connected to the Bluetooth® 2.0 interface. You can also use the phone books in the Bluetooth ® 2.0 interface ...

To play tracks from USB device
You can connect your iPod or USB memory device to the USB input terminal and play music files stored in the iPod or USB memory device. See the following section for the types of connectable devices ...