INFOGRAPHIC: Cars use up to 50% more fuel than tests show

According to a study by sustainable transport group Transport & Environment (T&E), carmakers are tricking consumers into buying cars they believe are more fuel efficient than they actually are.
New EU cars, including the Mercedes A, C, and E class, BMW 5 series, and Peugeot 308 were found to be pumping out around 50% more carbon dioxide (CO2) than recorded in lab tests.