In 1992, the Mercedes M111 E20 engine replaced the outdated 4-cylinder E20 engine from the M102 series. The new 2.0-liter engine differs from its predecessor primarily in a completely new cylinder block, which is made of cast iron, a new crankshaft, and a new connecting rod and piston group.
R4 Mercedes engines: M102, M111 E18, M111 E20, M111 E22, M111 E23, M166, M254, M260, M264, M266, M270, M271, M274, M282.
On the M111 E20 engine, the cylinder head has 4 valves per cylinder and two camshafts. The design provides space for hydraulic lifters, as well as electronic fuel injection systems.
Specifications
| Production years | 1992-2004 |
| Displacement, cc | 1998 |
| Fuel system | injector |
| Power output, hp | 136 (M 111 E 20) 180 – 192 (M 111 E 20 ML) |
| Torque output, Nm | 190 (M 111 E 20) 250 – 270 (M 111 E 20 ML) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 89.9 |
| Piston stroke, mm | 78.7 |
| Compression ratio | 9.6 – 10.4 (M 111 E 20) 8.5 (M 111 E 20 ML) |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | at the intake |
| Turbocharging | no (M 111 E 20) kompressor (M 111 E 20 ML) |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.5 |
| Fuel type | petrol |
| Euro standards | EURO 2/3 |
| Fuel consumption, L/100 km (for Mercedes C200 1999) — city — highway — combined |
11.1 6.3 8.4 |
| Engine lifespan, km | ~420 000 |
| Weight, kg | 167 |
Disadvantages of the M111 E20 engine
- Most of all, grease leaks will cause you problems, and their number grows with mileage.
- The mass air flow sensor has a modest resource; if it breaks, fuel consumption increases.
- Up to 100,000 kilometers, the water pump almost always starts to leak in the engine.
- From 100 to 200 thousand km, piston skirts often wear out or the exhaust cracks.
- After 200 – 250 thousand km, the oil pump or timing chain drive already requires attention.
