In some regions of Russia, temperatures can drop to (-40C°) or even lower so not every car can function as such conditions. In this article, you will be shown preparing a car for winter in Russia.
Now the side windows of the car. A large sheet of plastic glued to double-sided taped to the inside of the glass. Thanks to this setup, now on the outside nothing sticks out and the glass has the ability to open and close without interference because the plastic bottom edge slips under the window seal.
Actually everything. The above actions are sufficient to ensure that the cabin is warm, and the engine does not freeze.