The Mercedes-Benz M274 (often referred to by its displacement-specific codes like the A274 or A270 depending on the layout) is the sophisticated 2.0-liter, four-cylinder turbocharged petrol engine that serves as the heart of the C-Class W205 generation. Designed to replace the older M271, it focuses on “downsizing” technology—delivering V6-like power with the fuel economy of a compact four-cylinder.
Type: 2.0L Inline 4-Cylinder, 16-Valve
Induction: Single-Scroll Turbocharger with Intercooler
Fuel System: BlueDIRECT Third-Generation Direct Injection (Piezo injectors)
Valvetrain: Double Overhead Cam (DOHC) with Camtronic (variable valve lift)
Power Output: Varies by model (e.g., C200/C250/C300), typically ranging from 135 kW (181 hp) to 180 kW (241 hp).
Torque: Provides a broad torque band, typically between 300 Nm and 370 Nm.
Camtronic Technology: This innovative system allows the engine to switch between different intake valve lift profiles, optimizing fuel consumption during light loads and maximizing power when you floor it.
Rapid Response: The turbocharger is integrated into the exhaust manifold, significantly reducing the distance exhaust gases travel. This results in nearly instant boost and a very sporty, responsive feel.
Weight Reduction: The engine features a full aluminum crankcase and a hollow-cast crankshaft, reducing weight over the front wheels for better handling in the C-Class chassis.
Efficiency: Combined with the 7G-Tronic or 9G-Tronic transmissions found in the W205, the M274 offers impressive highway fuel economy without sacrificing the “Mercedes-Benz” premium acceleration.
This engine is the primary powerplant for the most popular W205 C-Class variants:
Mercedes-Benz C200 (2.0L variants)
Mercedes-Benz C250 * Mercedes-Benz C300
Mercedes-Benz GLC 250/300 (X253)
Mercedes-Benz E200/E250/E300 (W213)
