The M270 and M274 engines had aluminium blocks and cylinder heads, cast hollow crankshafts, double overhead camshafts (chain-driven), variable intake and exhaust camshaft timing, and four valves per cylinder. The engines were also available with an ECO start-stop function that enabled them to shut down when the vehicle was stationary in traffic to conserve fuel.
The 1.6-litre engines were available with Mercedes-Benz’s ‘Camtronic’ system (see video below) which used a smaller intake cam in partial load ranges for higher intake manifold pressure. In the M270 and M274 engines, three-stage load control could be achieved in the following manner:
- At very low loads, the air flow rate was conventionally set by the throttle valve;
- For medium loads, the cylinder charge was set on the intake camshaft while the throttle valve was opened; and,
- At higher loads, intake manifold pressure was further increased through the turbocharger.
The M270 and M274 engines were available with three transmission types:
- Six-speed manual transmissions;
- Seven-speed double-clutch transmissions (7G-DCT) for front-wheel drive vehicles; and,
- Seven-speed automatic transmissions (7G-Tronic Plus) for rear-wheel drive vehicles.
| Engine | Capacity | Peak power | Peak torque | Models |
|---|---|---|---|---|
| M270 DE 16 AL red. | 1595 cc (83.0 x 73.7) |
90 kW at 5000 rpm | 200 Nm at 1250-4000 rpm | C117 CLA 180, W176 A 180, W246 B 180 |
| M270 DE 16 AL | 1595 cc (83.0 x 73.7) |
115 kW at 5000 rpm | 250 Nm at 1250-4000 rpm | C117 CLA 200, X156 GLA 200, W176 A 200, W246 B 200 |
| M270 DE 20 AL | 1991 cc (83.0 x 92.0) |
115 kW at 5000 rpm | 270 Nm at 1250-4000 rpm | W246 B 200 Natural Gas Drive |
| 135 kW at 5000 rpm | 300 Nm at 1250-4000 rpm | W176 A 220 4MATIC, W246 B 220 4MATIC |
||
| 155 kW at 5500 rpm | 350 Nm at 1200-4000 rpm | C117 CLA 250, X156 GLA 250, W176 A 250, W246 B 250 |
||
| M274 DE 16 AL | 1595 cc (83.0 x 73.7) |
115 kW at 5000 rpm | 250 Nm at 1250-4000 rpm | W204 C 180, W205 C 180, W212 E 180 |
| M274 DE 20 AL | 1991 cc (83.0 x 92.0) |
115 kW at 5000 rpm | 270 Nm at 1250-4000 rpm | W212 E 200 Natural Gas Drive |
| 135 kW at 5500 rpm | 300 Nm at 1200-4000 rpm | X204 GLK 200, W205 C 200, C207/A207 E 200, W212 E 200 |
||
| 155 kW at 5500 rpm | 350 Nm at 1200-4000 rpm | X204 GLK 250, W205 C 250, C207 E 250, A207 E 250, W212 E 250 |
