Mercedes-Benz M111 engine

The M111 engine family was a straight-4 automobile engine from Mercedes-Benz, produced from 1992 to 2003. Debuted in the 1992 Mercedes-Benz E-Class (W124), this engine family is relatively oversquare and uses 4 valves per cylinder.

M111.920

The M111.920 is a 1.8 L (1799 cc) 16 valve engine. It produces 90kW (122hp) of power. It has a variant called the M111.921 which has a MAF-sensor instead of MAP-sensor on the first one.

Applications:

• 1993-2000 C180 (W202)

M111.940

The M111.940 is a 2.0 L (1998 cc) 16-valve engine with bore and stroke of 89.9 x 78.7 mm and compression ratio of 9.6:1. It produces 100kW (136hp) of power and 190 N-m of torque.

Applications:

• 1992-1995 E200
• 1993-2000 C180 (W202)

Unlike the 102, 103, and early 104 series engines, the engine did not use mechanical injection but the Siemens PEC/PMS (Pressure Engine Control) management system, which integrates fuel and spark management.

It is a speed-density type of system, as mixture formation is dependent on RPM, TPS angle, and manifold pressure (MAP).

Injectors work in pairs (idle, part load), or altogether (full-load).

It uses 2 ignition coils and no ignition distributor. Cylinders are fired in pairs (dual fire) - 1 and 4 together, and 2 and 3 together. The crankshaft position sensor is sensing the movement of two radially opposed position plates on the flywheel, one of which is magnetized, and the other is not. Thus, the engine management has precise information which group of cylinders to fire, and which group of injectors to spray.

M111.942

Similar to the M111.940 engine, used in the years following. It produces 100kW (134hp, 136PS) of power and 190 N·m (140 lb·ft) of torque.

Applications:

• 1995-2000 E200

M111.943

The M111.943 is a 2.0 L (1998 cc) 16-valve engine utilizing a supercharger similar to the 2.3L M111.973 engine. It produces 141kW (192hp) of power and 270 N-m of torque. This engine was built especially for SLK's exported to Italy, Portugal and Greece for tax reasons. The 'executive cars' tax limit was based in engine's capacity bigger than 2000 cc, so Mercedes in order to hit these markets made a mixture of the M111.940 with the supercharger of M111.973 for high performance at low engine capacity.

Applications:

• 1998-2000 SLK 200 Kompressor (exported only to Italy, Portugal and Greece)

M111.946

It produces 100kW (136hp) of power.

Applications:

• Mercedes-Benz SLK (R170.435)

M111.957

This is a 2.0L Kompressor engine utilizing a supercharger similar to the 2.3L M111.947 engine, but with a lower power output of 120kW (161hp, 163PS) and torque of 230 N-m (170 lb·ft) @ 2500 rpm.

Applications:

• 1998 E200K
• 2000-2002 E200K

M111.960 / M111.961

The M111.960 is a 2.2 L (2199 cc) 16-valve engine with bore and stroke of 89.9 x 86.6 mm and compression ratio of 10:1. It produces 110kW (150hp) of power and 210 N-m of torque.

Applications:

• 1992-1995 [[Mercedes-Benz W124|E220]
• 1994 - 1996 Mercedes-Benz W202 C220

M111.974

The M111.974 is a 2.3 L (2295 cc) 16-valve engine with bore and stroke of 90.9 x 88.4 mm and compression ratio of 10.4:1. It produces 110kW (150hp) of power and 220 N-m of torque.

Applications:

• 1995-1997 E230
• 1997-1998 C230
• 1993- Ssangyong Musso 4 cylinder.

M111.975

Similar to the 2.3L M111.974 engine, except the usage of a supercharger, boosting its power output to 170kW (214hp).

Applications:

• 1997-2002 CLK230 Kompressor
• 1999-2000 C230 Kompressor
• 1998-2004 SLK230 Kompressor

[NOTE: the M111.947 has been also supercharged to 137 KW on Mercedes-Benz W210|E200 Kompressor]

M111.973

Similar to the 2.3L M111.974 engine.

Applications:

• 1998-2000 SLK230 Kompressor

References

• Mercedes Benz E-Class - from Mercedes Club.cz (Czech Republic)

See also

• List of Mercedes-Benz engines