With my Blackberry I had incoming/outgoing calls, text message reader and directory search, all without touching the phone and on the navi screen. Now I have an iphone and it does the same, but without the ability to display text messages. No audio streaming I'm afraid.

Did you install the detachable hitch from BMW? It's my next job and I'm not sure about whether to go detachable or not...

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2004 X3 2.0d