The installation is quite easy. As for the coding, it needs to be done for full functionality but works about 95% w/o it. The extras are a compass and the street location showing up on the MFD. There might be more for navigation but I've only ever done enough to get the compass to show up as I know it's coded correctly. The coding can be done by your local dealership (although they might balk at doing it if they didn't install it themselves) and possibly someone with VCDS.
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