The M112 E28 engine appeared in 1997 and was positioned as a replacement for the in-line M104 E28. The new engine was based on the M112 E32 cylinder block, where a crankshaft with a smaller piston stroke was placed.
The cylinder heads are similar to those used on the M112 E32: aluminum, with one camshaft and three valves per cylinder (two intake, one exhaust). The diameter of the intake valves is 36 mm, exhaust 41 mm. Everything also uses a variable valve timing system, hydraulic lifters and an intake manifold with adjustable length. Timing chain drive, average chain life is about 200 thousand km. Bosch Motronic ME 2.0 control system.
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 | 1997-2005 |
| Displacement, cc | 2799 |
| Fuel system | distributed injection |
| Power output, hp | 197 – 204 |
| Torque output, Nm | 265 – 270 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 18v |
| Cylinder bore, mm | 89.9 |
| Piston stroke, mm | 73.5 |
| Compression ratio | 10.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | double row 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 E280 W210) — city — highway — combined |
15.8 7.9 10.8 |
| Engine lifespan, km | ~330 000 |
| Weight, kg | 160 |
The engine was installed on:
- Mercedes C-Class W202 in 1996 – 2000;
- Mercedes E-Class W210 in 1996 – 2002;
- Mercedes SL-Class R129 in 1997 – 2001;
- Mercedes S-Class W220 in 1998 – 2005.
Disadvantages of the M112 E28 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 E28
How much power does the Mercedes M112 E28 make?
The Mercedes M112 E28 develops 197 - 204 hp and 265 - 270 Nm of torque.
How much oil does the Mercedes M112 E28 take and which one?
Engine oil capacity: 7.5 liters. Recommended oil: 5W-30.
Does the Mercedes M112 E28 have a timing belt or chain?
Timing drive of the Mercedes M112 E28: double row chain.
Is the Mercedes M112 E28 turbocharged?
No, the Mercedes M112 E28 is naturally aspirated.
Does the Mercedes M112 E28 need valve clearance adjustment?
No, the Mercedes M112 E28 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Mercedes M112 E28 last?
The typical lifespan of the Mercedes M112 E28 is ~330 000 km with proper maintenance.
What is the fuel consumption of the Mercedes M112 E28?
E280 W210: city 15.8, highway 7.9, combined 10.8 L/100 km.
What cars was the Mercedes M112 E28 installed on?
Mercedes C-Class W202 in 1996 - 2000; Mercedes E-Class W210 in 1996 - 2002; Mercedes SL-Class R129 in 1997 - 2001; Mercedes S-Class W220 in 1998 - 2005.
What are the common problems of the Mercedes M112 E28?
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.
