2026 Audi RS 6 Avant vs 2026 Mercedes-Benz GLS600 4matic Maybach
| EPA figure | 2026 Audi RS 6 Avant | 2026 Mercedes-Benz GLS600 4matic Maybach |
|---|---|---|
| Model year | 2026 | 2026 |
| Body · drive | Wagon · All-Wheel Drive · Hybrid | SUV · All-Wheel Drive · Hybrid |
| Combined MPG | 16 | 15 |
| City / highway MPG | 14 / 21 | 13 / 18 |
| Fuel a year | $5,150 | $5,500 |
| Tailpipe CO₂ (g/mi) | 545 | 585 |
| Engine | 4.0 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.