2025 BMW X6 M Competition vs 2025 Mercedes-Benz AMG GLS63 4matic Plus
| EPA figure | 2025 BMW X6 M Competition | 2025 Mercedes-Benz AMG GLS63 4matic Plus |
|---|---|---|
| Model year | 2025 | 2025 |
| Body · drive | SUV · All-Wheel Drive · Hybrid | SUV · All-Wheel Drive · Hybrid |
| Combined MPG | 15 | 15 |
| City / highway MPG | 13 / 18 | 14 / 18 |
| Fuel a year | $5,500 | $5,500 |
| Tailpipe CO₂ (g/mi) | 589 | 578 |
| Engine | 4.4 L 8-cyl turbo | 4.0 L 8-cyl turbo |
| Transmission | Automatic (S8) | Automatic 9-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.