I have an 01 X5 with DSP, no Nav, no CD changer. When I went to connect my Intravee II I find two free iNet connectors but no analog input connector. There is a small coax but it is hooked up to something. I tried unhooking it and the radio still works. Do I need a digital to analog converter? It was so easy in my Z4. There is a small box (antenna?) installed up on the sidewall that has two small coax cables connected to it. I'm not sure what this does. I'm confused.

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