Ouch, I see that. I finally found some info on bimmernav.com but it looks like a spendy proposition to add it to a Nav X5. Sounds like a similar issue trying to get OEM sirius into our 325i with satellite prep. It's almost $500 for parts and then 1 to 2 hours of dealer programming. We are looking at a iPhone cradle instead that has XM support. I wish BMW didn't make it so darn hard.

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2007 328i Sport, Monaco Blue
2011 X35D - sold -Space Grey
2004 X5 4.4i - sold - Kalahari Beige
2001 X5 3.0i - sold - Pearl Beige
2006 325i Sport, Sonora Beige
2000 323i - sold - Sienna Red