With a mid unit I have put my Seicane in an e39 with dsp and it worked by powering one wire in the dash harness. It will be different if the vehicle has factory nav and I have no way of testing that as my factory nav x5 doesn't have dsp.

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Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2011 535xi auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install