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Mercedes M111 Engine 2.0L Review

M111 Engine 2.0L

The manufacturer began the production of the 2.0-liter engine in 1992. This engine replaced the old one 2.0l M102 engine. The M111 series includes the M111 E18, M111 E22, and M111 E23 engines.

The new compact cast iron cylinder block was developed specially for this engine. Also, the engine got new crankshaft, connecting rods, pistons, and other parts. Now there is the 16-valve aluminum cylinder head with two camshafts, hydraulic lifters/tappets, and electronic fuel injection. Manufacturer produced a naturally aspirated engine as well as a supercharged engine - the M111 E20 ML (supercharger Eaton M62). The engine has the timing chain and the ECU system Bosch ME 2.1.

The M111 series received some upgrades in 2000: reinforced cylinder block, new cylinder head, individual ignition coils with new spark plugs, connecting rods and pistons for higher compression ratio, fuel injection improvements, the new engine control system Siemens ME-SIM4. The supercharger Eaton M62 was replaced by Eaton M45.

In 2004, the M111 series was utterly taken out from production and replaced by M271 engines.

Engine Specs

Manufacturer
Stuttgart-Untertürkheim Plant
Production years
1992-2004
Cylinder block material
Cast Iron
Cylinder head material
Aluminum
Fuel type
Gasoline
Fuel system
Fuel injection
Configuration
Inline
Number of cylinders
4
Valves per cylinder
4
Valvetrain layout
DOHC
Bore, mm
79.9
Stroke, mm
78.7
Displacement, cc
1998
Type of internal combustion engine
Four-stroke, naturally aspirated and supercharged versions
Compression Ratio
8.5 (Kompressor); 9.6; 10.6
Power, hp
136-129/5100-5500
163-192/5300-5400 (Kompressor)
Torque, lb ft
136-140/3500-4000
177-184/2500 (Kompressor)
Engine weight
Firing order
1-3-4-2
Engine oil weight
0W-30, 0W-40, 5W-30, 5W-40, 10W-40, 15W-40
Engine oil capacity, liter
5.5 (7.0 since 2000)
Oil change interval, mile
6,000
Applications
C 200 W202, C 200 Kompressor W202, C 200 Kompressor W203, CLK 200 C208, CLK 200 Kompressor C208, E 200/ 200 E W124,
E 200 W210, E 200 Kompressor W210, SLK 200 R170, SLK 200 Kompressor R170, V 200/ Vito 113 W638

M111 E20 2.0l Engine Problems and Reliability

1. Oil Leaks. This is the common issue of the 111 series. The causer is bad cylinder head gasket.
2. Loss of power, high fuel consumption. The root of evil is the air flow sensor.
3. All M111 series engines are quite noisy and featured by a short sparkplug life.

Modifications

M111.940 (1992-1998) - the first 136 hp version with compression ratio 10.4 and PMS injection. This engine you can find in Mercedes-Benz E200 W124/W210, C200 W202.
M111.941 (1994-2000) - the same motor but with Bosch Motronic for Mercedes-Benz C200 W202.
M111.942 (1994-2000) - the same 940 engine with HFM injection for Mercedes-Benz E200 W210.
M111.943 (1996-2000) - M111.940 engine with supercharger Eaton 62 (0.5 bar), 192 hp of power and 177 ft lb of torque. Mercedes-Benz SLK 200 Kompressor R170 was equipped by this engine.
M111.944 (1996-2000) - M111.943 for Mercedes-Benz CLK 200 Kompressor C208 and C 200 Kompressor W202.
M111.945 (1994-2002) - M111.942 version for Mercedes-Benz CLK 200 C208 and C 200 W202.
M111.946 (1996-2000) - version of M111.945 for Mercedes-Benz SLK 200 R170.
M111.947 (1997-2002) supercharged engine modification with 186 hp of power and 192 ft lb of torque. Mercedes-Benz E200 Kompressor W210.
M111.951 (2000-2002) - EVO engine. Compression ratio is 10.6, the power is 129 hp, torque - 140 ft lb. This engine is for Mercedes-Benz C 180 W203.
M111.955 (2000-2002) - supercharged M111.951 with supercharger Eaton 45 (0.37 bar). This modification is for Mercedes-Benz C 200 Kompressor W203, CLK 200 Kompressor C208 and E 200 Kompressor W210.

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