Top 10 Worst Vehicles for the Environment

5. Mercedes-Benz G 550

The Mercedes G Class is a bold, boxy SUV that’s equipped with a 5.5-liter 382-hp V8 that propels this truck’s 5,578 lb. body around the streets, trails or whatever else gets in the way. Combine that with its poor aerodynamics and the G 550 manages to get a pitiful 13 combined MPG. That’s why it got a score of 22. That’s pretty bad, but not as bad as the final five on the list.