I know for a fact that BMW used/uses specific Hot/Cold weather packages for their cars which are region specific.
Mostly its just slightly adjusted air inlets in the front bumper like recently on the M235i.
But for example I know that the E46 with the N42/N46 Engine had some specific different engine parts for cold weather areas, as the normal ones would just freeze over.
(Oil aerosol separator in that case, if I correctly translated it to English.)