Just spoke to the folks over at South Bay BMW.
They told me that I need to bring the car in to check versions (oh, great).
Nonetheless, I am going to take it in to see what happens.

Does anyone have a part number for the new CD that I can make reference to?

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2006 4.4i
Jet Black/Truffle Brown
Cold/Premium/Rear Climate/Sport
Adj Ride Ht./Navi/Premium Sound
IcelinkPlus/iPod