"The European directive on mobile air conditioning systems (MACs) (Directive 2006/40/EC) aims at reducing emissions of HFC R134a from the air conditioning systems fitted to passenger cars.
In practical terms, the use of the gas that is currently used for filling MAC systems (HFC R134a) is not permitted for newly type-approved vehicles sold in the EU since January 2011, and all new vehicles sold from January 2017."
"The EU has dictated that, instead, the impacted vehicles must use a refrigerant gas with Global Warming Potential (GWP) of 150 or less. The directive only applies to new vehicles. All vehicles currently using R134a will be able to continue to use that gas." (http://www.linde-gas.com/de/products_and_supply/refrigerants/environment_and_legislation/global_warming_legislation_hfc_control/eu_mac_directive/index.html)
" The traditionally used refrigerant in MAC systems, R134a, has a GWP of 1300. The aim of the Directive is to enforce the use of gases with GPW lower than 150."
"From 1 January 2017, the use of fluorinated greenhouse gases with a GWP higher than 150 in all new vehicles put on the EU market will be totally banned. New vehicles with MAC systems using these gases will not be registered, sold, or able to enter into service in the EU." (https://ec.europa.eu/growth/sectors/automotive/environment-protection/mobile-air-conditioning-systems_en)