The latest edition of the Mercedes-Benz G-Class is equipped with the advanced, more user-friendly generation of telematics technology. A Bluetooth hands-free system for mobile phones is built in as standard. A new media interface can also be specified as an option that allows an external music storage device to be linked up to the off-roader's on-board electronics and control system. Audio tracks appear in the instrument cluster and in the centre console's colour display, and can be simply called up by using the buttons on the multifunction steering wheel. The audio device's battery is recharged at the same time. The Audio 20 CD including a built-in six-disc CD changer is standard for the G 320 CDI models. This unit includes a dual tuner for superior radio reception, speed-sensitive volume control, as well as a keypad for entering telephone numbers and radio frequencies. There is also a Bluetooth interface which establishes a wireless connection between a mobile phone and the vehicle's hands-free system.