When your car’s cooling system is working with refrigerant’s new standard in EU and USA called HFO1234yf You have serious problem:
Eco-friendly car refrigerant turns into deadly gas if vehicle catches fire:
http://www.telegraph.co.uk/motoring/news/9021335/Eco-friendly-car-refrigerant-turns-into-deadly-gas-it-vehicle-catches-fire.html
New refrigerant for cars, EU must not ignore fire risk:
http://www.umweltbundesamt.de/en/topics/new-refrigerant-for-cars-eu-must-not-ignore-fire