Actually the iPhone is a bit of a special case since I believe it is meant to plug into the 6fl connections. This would provide music selection, playback, and power for all functions with communications taking place via Bluetooth link (I think). Conversely what it does not do (and I would think will require one of the "eject box" additions) is plug into the vehicle antenna. For a similar degree of integration, the Razr requires a snap-in adaptor and the eject box.

While power can be obtained for the Razr by other means, there is no access to the vehicle antenna. For some of us, vehicle antenna access would be very beneficial to improve wireless reception

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BMWs: 2007 X5 3.0
2002 330xi
1991 525i (ret'd)
1985 325e (ret'd)