French government officials are investigating Mercedes, Ford, and Renault for cheating emissions testing standards. An S-Class Mercedes, a Ford C-Max, and a Renault “Captur” all failed the test, emitting far more nitrogen oxide than European standards allow. The failure of the Renault was particularly troubling, not because it’s French but because it supposedly met the new, much stricter Euro-six standards. French officials intend to test a total of 100 vehicles as part of their investigation.