Tesla X, temperature and chipped windshield

Early spring this year, I went up to my cabin. The snow was gone, but it was still cold in the mountains. I knew I had a chip in my windshield, but didn’t think more of it. Sunday morning, before leaving, I decided to preheat my Tesla X. To my surprise when I entered my TX, the windshield had a crack cross the whole window, starting from the well known chip. Learnings: In Norway when the temperature is below 0 degrees, do NOT heat up your Tesla X if you have a chip/crack in your windshield. Due to temperature differences outside and inside the Tesla, the tension in the big Tesla X windshield cannot withhold the weakness in the chip/crack and it will develop easily. Normally this apply to all windshields on other cars as well, but the huge windshield on the Tesla X is more fragile to this. So, careful to heat your Tesla X in minus Celsius degrees. Check your windshield beforehand!!!