Dension adapter iPhone, AUX (replaces CD changer) for BMW. GW17BM4

BMW adapter iPhone, AUX (replaces CD changer). iGateway. 
GW17BM4

The Dension iPod Interface brings complete integration of the Apple iPod or iPhone with your factory fitted stereo. 
The Dension Gateway 100 is our standard solution for most vehicles. 
Providing you with full iPod control from your car’s original radio, the simple aim is to provide iPod integration without making unnecessary changes to your car’s original equipment or dashboard. 
Choose an iPod cradle from the addons or choose docking cable for an even neater installation by simply having everything tucked away in your glove box or armrest.
Full Integration
Dension translates CD changer messages to iPod controls and switches the iPod automatically on and off as you select/deselect the CD changer source and your iPod is charged while connected.
Control at your Fingertips
The Gateway 100 iPod car adapter works like an interpreter between your devices and the car, converting instructions from the car’s controls into a language that your iPod can understand and respond to. 
When connected into the car, Gateway 100 emulates a CD changer (usually, sometimes it’s an auxiliary input), thus making those controls on the radio available to control the devices connected to it. 
Of course, every Gateway 100 comes with a comprehensive user manual, but in most cases, you select the CD changer function, then CD6, and a series of menus are opened up to you to control your music. 
Text Information
Using the controls on the radio or the steering wheel, the menus of the iPod can then be browsed and music selected. 
Depending on your cars display capability, you will see information displayed on your radio or information cluster* telling you the song details (e.g. Songs, albums, artists etc), or where you are in the menus. 
As a rough guide, if your car displays radio station names, it is probably capable of displaying your iPod track information. *The amount of text available depends on the car’s capabilities.

More: www.dension.com