BMW, Audi, Mercedes, Porsche (MOST) adapter USB, iPhone, AUX. GW51MBE.

BMW 1, 3, 5, X3, X5 series (2003-2010->) E60..., E63, E65, E70, E80, E90, Fxx..., with BMW enabler. Gateway 500. Dension.
GW51MBE. Single-FOT.

Mercedes Benz (2003-2007->), Audi (2005-2011->) with MMI 2G, MMI 3G..., Porsche (2004-2009->), Mini R55, R56 (2006->). 

Want to listen to hours (days) of uninterrupted music? Have a smartphone and want to use it in the car to listen to music? 
Already have a handsfree kit? We the solution for you.  Easy to use menu browsing. 
All information is displayed on the screen or cluster display. Connect whatever music source you want to.
Gateway 500S is Dension’s premium interface and is designed to work with cars utilizing the fiber optic MOST™ system. 
Since there is no Bluetooth functionality in this version the feature set is a bit less, thus enabling a lower price.
Features
Easy to use interface with menu browsing and music information on your car display (including cluster) regardless of the music source
iPhone support through the 'Lightning to USB' cable (not included in the package)
USB music playback
The sound of phone music, videos, navigation, podcasts etc. come through the car speakers
Phone battery charging on the go
iPhone, Android, Blackberry and Windows Phone compatible
Aux-in available
External device control through the original sound system controls
Retain the factory look of the car but add new features.

www.dension.com