Bimmercode can set most of these types of coding.
It let me add the function to raise/lower the Rolls-Royce hood ornament to idrive for crazy example (of course it didn't also add the hardware). I did see similar options in the idrive for TV etc so if certain things never worked that's a good place to start.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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