You probably don't have bluetooth, in the sense of being able to hook your cell phone to your car. You probably have BMW Assist.

I don't know for sure with your year and model, but with my '03 4.4i, the talking man button did nothing till I had bluetooth installed. If your display shows "Empty Phonebook" when you push the R/T button, it's because your BMW Assist phonebook is empty. That's the phone unit and antenna you're seeing in the back end of your X. If you press the SOS button or BMW Assist button, you'll hear a voice telling you you aren't subscribed to the service, how to subscribe, and etc.

If you want to install bluetooth, like what bimmernav sells, your BMW Assist module must be removed, and is replaced by the bluetooth module. The same microphone can be used, but you'll need a pairing button to tie yor phone to your car, the bluetooth ULF module, and (I believe) a BT antenna. It all screws into and plugs into your existing wiring. The bimmernav peoiple can help you directly - they know exactly what they're talking about.

I had bluetooth installed last year in my '04 325ciC and now this Fall in my '03 X5. I wouldn't be without it. It works like a charm, and is worth every cent, as far as I'm concerned.

Hope this helps,
Dave

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2003 4.4i (The X5 is WAAAY more fun than my Jeep used to be... )