Salty B,
You can add a bluetooth adapter at the CD player connection. I installed one. No DSP and Business CD installed on mine. The bluetooth adapter works with AUX. It's better than an FM Bluetooth cigarette lighter adapter. Answering a phone call is a hassle though. Without a mic, the phone picks up too much phone speaker noise. It's better to use the phone speaker options. Bluetooth music is crisp and full of sound for its age. Welcome to the board.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)