M3 employs a BMW Business sound system, integrated into the standard in-dash monitor that's shared with the standard TV, trip computer and optional satellite navigation. It features 10 speakers, six preset stations, a six-CD boot-mounted changer, cassette slot and remote steering wheel controls for volume, preset station select and mode. A Harman Kardon sound system is optionally available. Refreshingly, the volume and navigation controls are located on the right, nearer the driver.