Aftermarket head unit for BMW M5 E39 520i, 523i, 525i, 528i, 530i, 535i, 540i, M5, with DVD player and GPS navigation system built-in, also comes with bluetooth function, support steering wheel control, USB, iPod, SD cards, TV tuner, radio tuner, etc. Buy here: http://www.dvdgpsnav.com/bmw-e39-dvd-gps-navigation-bluetooth-headunit-hd-touch-screen.html