The M112 E26 engine – one of the youngest representatives in the extensive family of M112 engines appeared in 2000 as a replacement for the M112 E24 and was intended for Mercedes models with an index of 240.
The engine is based on a cylinder block from the M112 E28, in which a crankshaft with an even smaller piston stroke was placed. The cylinder heads are the same as on the M112 E28: aluminum, with one camshaft (SOHC) and three valves per cylinder: two intake, one exhaust. The diameter of the intake valves is 36 mm, the exhaust valves are 41 mm. There is a variable valve timing system, hydraulic lifters, an intake manifold with variable length.
Mercedes V6 family: M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, M276 DE35.
Specifications
| Production years | 2000-2006 |
| Displacement, cc | 2597 |
| Fuel system | distributed injection |
| Power output, hp | 170 – 177 |
| Torque output, Nm | 240 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 18v |
| Cylinder bore, mm | 89.9 |
| Piston stroke, mm | 68.2 |
| Compression ratio | 11.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for E240 W211) — city — highway — combined |
15.4 7.4 10.5 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 160 |
The engine was installed on:
- Mercedes E-Class W210 in 1999 – 2002, E-Class W211 in 2002 – 2005;
- Mercedes C-Class W202 in 2000 – 2001, C-Class W203 in 2000 – 2005;
- Mercedes CLK-Class C209 in 2002 – 2005.
Disadvantages of the M112 E26 engine
- The signature failure of this series of engines is the destruction of the crankshaft pulley.
- The remaining engine problems are somehow related to increased oil consumption.
- Due to contamination of the crankcase ventilation, grease creeps out from under the gaskets and seals.
- The main cause of oil burnout here is usually in hardened valve stem seals.
- Lubrication leak points are also the oil filter housing and heat exchanger.
Frequently asked questions about the Mercedes M112 E26
How much power does the Mercedes M112 E26 make?
The Mercedes M112 E26 develops 170 - 177 hp and 240 Nm of torque.
How much oil does the Mercedes M112 E26 take and which one?
Engine oil capacity: 7.5 liters. Recommended oil: 5W-30.
Does the Mercedes M112 E26 have a timing belt or chain?
The Mercedes M112 E26 uses a timing chain.
Is the Mercedes M112 E26 turbocharged?
No, the Mercedes M112 E26 is naturally aspirated.
Does the Mercedes M112 E26 need valve clearance adjustment?
No, the Mercedes M112 E26 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Mercedes M112 E26 last?
The typical lifespan of the Mercedes M112 E26 is ~300 000 km with proper maintenance.
What is the fuel consumption of the Mercedes M112 E26?
E240 W211: city 15.4, highway 7.4, combined 10.5 L/100 km.
What cars was the Mercedes M112 E26 installed on?
Mercedes E-Class W210 in 1999 - 2002, E-Class W211 in 2002 - 2005; Mercedes C-Class W202 in 2000 - 2001, C-Class W203 in 2000 - 2005; Mercedes CLK-Class C209 in 2002 - 2005.
What are the common problems of the Mercedes M112 E26?
The signature failure of this series of engines is the destruction of the crankshaft pulley. The remaining engine problems are somehow related to increased oil consumption. All known problems.
As far as I know m112 engines dont have phase regulators of the camshafts. Intake manifold has variable lenght