You need everything in the trunk. The screen is just a screen.... It requires modules for each feature, including the radio. All of which are in the trunk.
BMW sells a retrofit harness that makes the wiring considerably easier, but unless you have a parts car with a complete working system its going to cost you more to source all the modules and screen(not to mention the new center console for the dash, and the brackets for the trunk and different paneling) then you would spend on a dynavin.
Last edited by legoman67; 11-22-2017 at 12:02 AM.
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