Both Grom and Audiovox mediabridge specify you will need a convertor if you have DSP. If you are sure your X came with DSP it would seem you need one. With something like this I would call the maker and get their technical input specific to your 06 X5.
I suggest you call both Grom and Audiovox and ask how their offering compares to the other as well as ask about price difference before finalizing your decision. This thread is incomplete as far as a point by point comparison.
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 X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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