2018 Mercedes-Benz GLS550 4matic vs 2018 Mercedes-Benz S450
| EPA figure | 2018 Mercedes-Benz GLS550 4matic | 2018 Mercedes-Benz S450 |
|---|---|---|
| Model year | 2018 | 2018 |
| Body · drive | SUV · 4-Wheel Drive · Gas | Large · Rear-Wheel Drive · Gas |
| Combined MPG | 16 | 22 |
| City / highway MPG | 14 / 19 | 19 / 28 |
| Fuel a year | $5,150 | $3,750 |
| Tailpipe CO₂ (g/mi) | 556 | 403 |
| Engine | 4.7 L 8-cyl turbo | 3.0 L 6-cyl turbo |
| Transmission | Automatic 9-spd | Automatic 9-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.