Mercedes-Benz M278.912, Engine
| Engine capacity | 3,994 cm³ |
| Maximum power (range), hp | 421 - 422 |
| Maximum torque, N*m (kg*m) at rpm. | 600 (61) / 1900 |
| Fuel used | Gasoline AI-95 |
| Fuel consumption, l/100 km | 11.9 |
| Engine type | V-shaped, 8-cylinder |
| Additional engine information | direct fuel injection |
| Maximum power, hp (kW) at rpm | 421 (310) / 5500 |
| Supercharger | Twin turbocharging |
| Valve drive | DOHC |
| Number of valves per cylinder (range) | 4 |
| Start-stop system |