[nonagon]

According to BMW (emphasis mine):

7. PlugIn

What is BMW Apps PlugIn?
PlugIn enables BMW Apps to display the familiar iPod navigation menu in the vehicle’s display screen. It also
allows control of the music playback features with an iPhone, iPod touch or the latest-generation iPod nano, using
the vehicle’s controls. In addition, the display screen gives direct access to the latest iPod functions, such as a
custom playlist and Genius Mixes, which lets you automatically create playlists from songs in your music library
that go great together.

What is needed for the feature BMW Apps PlugIn?
For PlugIn a BMW with option SA 6NR (BMW Apps) and an iPhone 3G, iPhone 3GS, iPhone 4 or iPod touch
(second and third generation) with at least iOS 4.2.1 is required.
PlugIn can only be used via the Snap-In-Adapter, not via the BMW USB port.