Originally Posted by kerry edwards

It's all a test to see whether you are truly worthy of a Teutonic machine. A Nietzschean engineer, working on the principle that whatever doesn't kill you makes you stronger, realized that the incredible mechanical engineering and reliability in the rest of the car would likely turn its owner into a Southern European or British wimp unworthy of the epitomy of Aryan culture, so programmed in a repetitive failure of the heating system to test our mettle.