European fix for VW diesels complies with law but real-world emissions still too high

Updates to the millions of Volkswagen TDI diesel cars that turned out not to meet European emission regulations were supposed to be well underway by now. German authorities had signed off on the modifications—software updates and for one group of engines, a new plastic insert to alter incoming airflow—and VW began the updates with its... European fix for VW diesels complies with law, but real-world emissions still too high