Heh i love how they do indeed test the cars for winter but the worst part is a lot of us who lives in the northned parts of the world rarely gets to se this kind of snow landscapes it is more like the image below and a lot more salt
Bmw should maybe try these cars where the winter conditions are more real and the use of salt is so extensive that the cars ages 2-3 years faster then the average car who drives only in where it is snow like on the pictures.
For example where i live pretty much in the middle of Sweden we have very few days with snow conditions like that its mostly -2c to +4c during winters and constant rain and salt on the roads so it won't freeze during nights. So a car pretty much ages around 2-3 years faster when driven here compared to other parts of the country. I hate the use of salt on the roads....