Navigate through playlists, albums, artists and songs with track up/down, fast-forward/reverse, scan, random and repeat functions using the factory radio, MMI and steering wheel controls. Does not lock out the iPod or iPhone's controls or display, so the iPod or iPhone can be used to select music as well. Charges iPod or iPhone while docked. Navigation, Bluetooth, satellite radio and OEM CD changer will continue to function. The included interface has full text display capability, auxiliary input for other audio sources and USB support for other mp3 devices. iPod or iPhone text and search information are displayed directly on the OEM video screen. Includes USB charging for iPhone 3G, iPod Touch 2nd gen and iPod Nano 4th gen. Ashtray door will continue to function normally. Fits in OEM front ashtray location.