Enter the vin into bimmer.work website for a list of the specs/options.
Also enter the last 7 digits of the vin into realoem.com/bmw and then you can see what parts were fitted or optional.
I doubt a 2012 entry nav HU will ever work.
My 2014 116i with BMW professional radio had no upgrade options so I changed the screen for a 10.25" Chinese Android unit.
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