So after three days in the shop, I was given the reply Apple and BMW are working to resolve this problem (will not sync). Apparently it is lomited to pre April 2007 production X5's.

As for the Bold it works well with the X5. However the trackball has frozed on me several times - waiting for a replacement unit.

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07 X5 E70 4.8i
04 Z4 E85 3.0