The Mercedes M272 E25 engine, with a working volume of 2.5 liters, was released in 2005 and was intended to replace the previous M112 E26. The engine block is the same as that of the M272 E30, but a crankshaft with a piston stroke reduced to 68.4 mm is used.
The V6-family includes: M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, M276 DE35.
The cylinder heads are similar to the M272 E30: aluminum, with two camshafts (DOHC), 4 valves per cylinder, inlet valve diameter 37 mm, exhaust 28 mm. The technology of stepless variable valve timing on the intake and exhaust camshafts, hydraulic lifters, a dual-mode intake manifold with adjustable length was used. The timing drive is chain, the chain resource is about 150 thousand km. Bosch ME control system 9.7.
Specifications
| Production years | 2005-2011 |
| Displacement, cc | 2496 |
| Fuel system | distributed injection |
| Power output, hp | 204 |
| Torque output, Nm | 245 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 88 |
| Piston stroke, mm | 68.4 |
| Compression ratio | 11.2 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.0 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Mercedes C230 W204) — city — highway — combined |
13.5 6.9 9.3 |
| Engine lifespan, km | ~275 000 |
| Weight, kg | 177 |
Disadvantages of the M272 KE25 engine
- The weakest point of this power unit is its timing drive.
- Due to the rapid wear of the balancer shaft sprockets, the entire timing drive becomes unusable.
- Another known problem is a stuck exhaust manifold flap.
- Plastic cylinder head plugs ooze oil for 50 – 70 thousand km.
- Overheating of the engine leads to detonation and destruction of the aluminum coating in the cylinders.
