I have a 06 x5 nav with dsp , from what I've read it looks like I can use the 300 but was also interested in cd changer retention. As I understand it with the retention I have full control of my cd changer via steering whell controls but get to add an ipod into the mix?

Also wondered about price for these items as I am comparing solutions available.

Thanks for replying

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Drives: 330, X6 50i