I have searched and researched my head off, trying to wrap my brain around the thousand and one options for the E53.
I installed a Motorola bluetooth in my Jaguar, and may do the same in the X5, or I might go BMW plug and play. But first, what are all these pieces I have?
FYI, it's a 2001. X5, 4.4, build date 06/01, Canadian model, with nav and DSP.

Thanks in advance, and a Merry Christmas to all, from myself, Rob, and my family.

First, the armrest.



An antenna of some sort, with 3 coax cables:



Assorted plugs by the Nav system:


Something, maybe an amp?



And a couple unused plugs: