All cars built 2014 or later are Euro 6, which is the standard for diesel, after the earlier cars were caught cheating. All cars built 2004 or later are Euro 4

All cars built 2014 or later are Euro 6, which is the standard for diesel, after the earlier cars were caught cheating. All cars built 2004 or later are Euro 4, which is the standard for petrol cars. These are increasing strict emissions standards for maximum quantity of various pollutants.