Since 2019 diesel engines in the EU get a road test. http://www.nytimes.com/2015/10/29/business/europes-plans-to-test-cars-emissions-is-criticized.html?_r=0 http://www.theguardian.com/environment/2015/oct/09/mercedes-honda-mazda-mitsubishi-diesel-emissions-row http://www.ft.com/intl/cms/s/0/7593e5ec-6d07-11e5-8171-ba1968cf791a.html#axzz3pzCmT5SQ Unfortunately, the powerful lobby of automakers agreed extra time and a sag of the 2017 environmental standards but times seem to be changing.