As the car industry learns that the “mildly flammable” refrigerant (per ASHARE 34) HFO-1234yf is actually a Category 1 Extremely Flammable Gas (per the manufacturer’s SDS and 1910.1200) and those facilities who have over 10,000 pounds of HFO-1234yf fall under PSM (1910.119), it is becoming a less and less attractive global warming (GW) alternative. And those who have been following this concern in the vehicle manufacturing industry know that it was Daimler who bucked the European Union (EU) and said they would not use HFO-1234yf in their vehicles because of safety concerns they uncovered in their own testing, even so much that Daimler said they would pay the EU fines before using the new refrigerant. Heck, they even recalled some cars that had HFO-1234yf already in them. Well, Daimler just announced that in their 2017 Mercedes E-Class they will introduce an air conditioning unit that uses Carbon Dioxide (CO2). And if we can believe the media Audi, BMW, Porsche and Volkswagen are not far behind.