Smart M 135 E 15, Engine
| Engine capacity | 1,499 cm³ |
| Maximum power (range), hp | 109 - 122 |
| Maximum torque, N*m (kg*m) at rpm. | 145 (15) / 4000 |
| Fuel used | Petrol |
| Fuel consumption, l/100 km | 5.9 - 6.8 |
| Engine type | In-line, 4-cylinder |
| Additional engine information | DOHC |
| Maximum power, hp (kW) at rpm | 109 (80) / 6000 |
| Compression Ratio (Range) | 10.5 |
| Cylinder diameter (range), mm | 75 |
| Piston stroke (range), mm | 84.8 |
| CO₂ emissions (range), g/km | 139 - 149 |
| Valve drive | DOHC |
| Number of valves per cylinder (range) | 4 |