The in-line M104 E28 engine was to be replaced by the M112 E28 engine, which debuted in 1997. The M112 E32 cylinder block served as the foundation for the new engine, which featured a crankshaft with a smaller piston stroke.
M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, and M276 DE35 are all members of the V6-family.
The aluminum cylinder heads, which have one camshaft and three valves (two intake and one exhaust) per cylinder, are comparable to those found on the M112 E32. The intake and exhaust valves have diameters of 36 mm and 41 mm, respectively. Additionally, everything makes use of hydraulic lifters, an intake manifold with adjustable length, and a variable valve timing system. The average chain life of a timing chain drive is roughly 200,000 kilometers. Control system Bosch Motronic ME 2.0.
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 |
Disadvantages of the M112 E28 engine
The crankshaft pulley’s destruction is the engine series’ hallmark failure.
Increased oil consumption is somehow connected to the remaining engine issues.
Grease seeps out from under the gaskets and seals as a result of crankcase ventilation contamination.
Here, hardened valve stem seals are typically the primary source of oil burnout.
The heat exchanger and oil filter housing are also potential sources of lubrication leaks.