Did you get it installed? I just did mine yesterday and it was a PITA because there were no instructions for my unit. Had to guess at most of it.

What unit do you have? I have an Xtrons. Maybe I can help?

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2004 X5 4.4 Build 01/04 Alpine White on Schwarz Dakota Leather, Anthracite Headliner
Xtrons Android HU, SPORT PKG, COLD WEATHER PKG(W/REAR HEATED SEATS AND HEATED STEERING WHEEL), CONVENIENCE PKG, FACTORY HITCH