Mercedes-Benz M111 Engine

The M111 engine family is 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. All engines in the family use a cast iron engine block and aluminum alloy cylinder head.

M111.920 and M111.921

The M111.920 is a 16 valve engine with bore and stroke of 85.3 mm × 78.7 mm. It produces of power at 5500 rpm and at 4200 rpm. Starting with 1996 it has a variant called the M111.921 which has a MAF (Mass Air Flow)-sensor instead of MAP-sensor on the first one, and using ECU instead of PMS.

Applications:
* 1993-2000 C180 (W202)

M111.940

The M111.940 is a 16-valve engine with bore and stroke of and compression ratio of 9.6:1. It produces of power and of torque.

Applications:
* 1992-1995 E200 (W124)
* 1997-2002 CLK200 (C208)
* 1993-2000 C200 (W202)

Unlike the 102, 103, and early 104 series engines, the engine did not use mechanical fuel 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 following years. It produces of power and of torque.

Applications:
* 1995-2000 E200 (W210)
* 1993-2000 C200 (W202)

This motor never had PMS. Early models -95 to -97 has a HFM-motronic, hot-film type air/fuel metering device, and -97 to -2002 with ME2.1 motronic. The later system also has a magnet on the intake camshaft, and gives signal to ECU, to assist the motor in producing more torque at low revs. The early motor didn't have any camshaft position sensor, so wiring was much different.

The only problem experienced with this M111 excellent reliability motor is the originally installed Victor Reinz headgasket, which eventually tore apart by age, and made the top lose coolant on the side. Other than that, only some year models, had bad insulation on the engine wiring, that needed all the wiring to be replaced.

M111.943

It produces and .

Applications:

* 1996-2000 SLK200 Kompressor (R170)

M111.944

The M111.944 is a 16-valve engine utilizing a supercharger similar to the 2.3L M111.973 engine. It produces of power and of torque. This engine was built especially for SLK 170 and CLK 208 exported to Italy, The Netherlands, 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:
* 1996-1999 C200 Kompressor (W202)

M111.946

It produces and .

Applications:
* 1996-2000 SLK200 (R170)

M111.947

It produces and .

Applications:
* 1997-2002 E200 Kompressor (W210)

M111.951 / M111.952

EVO engine (M 111 E 20 EVO). Naturally aspirated, compression ratio is 10.6:1. The power is at 5300 rpm, torque - at 4000 rpm. Improvement includes reinforced cylinder block, new cylinder head, individual coil-on-plug ignition with new iridium-tipped spark plugs for 100,000km/60,000 mile replacement intervals, connecting rods and pistons for higher compression ratio, fuel injection now Siemens SIM4, EuroIV emissions compliant, dual oxygen sensors.

Applications:
* 2000-2002 Mercedes-Benz C Class C180 (W203)
* 2000-2003 V200/Vito 113

A M111.952 variant of this engine was fitted to the final model year S202 where it replaced the older 1.8l 122hp version for MY 2001. 2295 built from 06.2000 until 1.2001.

M111.955

This is a 2.0L Kompressor engine utilizing a supercharger and produces of power. It has 4 cylinders with 16 valves.

Applications:
* 2000-2002 Mercedes-Benz C Class (W203) Kompressor
* 2001 Mercedes-Benz SportCoupe (CL203) Kompressor
* 2001 Mercedes-Benz SLK-200K (R170) Kompressor

M111.957

This is a 2.0L Kompressor engine utilizing a supercharger similar to the 2.3L M111.974 engine, but with a lower power output of and torque of @ 2500 rpm.

Applications:
* 2000-2002 E200K

M111.958

It produces and .

Applications:

* 2000-2004 SLK200 Kompressor (R170)

M111.960 / M111.961

The M111.960 is a 16-valve engine with bore and stroke of and compression ratio of 10:1. It produces of power and of torque.

Applications:
* 1992-1995 E220
*1994 - 1996 C220

M111.970 and M111.974

The M111.970 is a 16-valve engine with bore and stroke of and compression ratio of 10.4:1. It produces or 90 kW (122 PS; 120 hp) of power and or 180 N·m (132 lb·ft) of torque.

Applications:
* 1995-1997 E230
* 1997-1998 C230
* 1996-2003 V230/Vito 114
*1996-2004 MB100 2.3
*2005-2013 Ssangyong Actyon 4 cylinder.
*1997-2014 Ssangyong Chairman 4 cylinder.
*1996-2004 Ssangyong Istana / Daewoo Istana 4 cylinder.
* 1993-2003 Ssangyong Korando 4 cylinder.
* 2005-2014 Ssangyong Kyron 4 cylinder.
*1993-2003 Ssangyong Musso 4 cylinder.
*2001-2012 Ssangyong Rexton 4 cylinder.

M111.973

It produces and .

Applications:

* 1996-2000 SLK230 Kompressor (R170)

M111.975

Similar to the 2.3L M111.970 engine, except the usage of a supercharger (kompressor), boosting its power output to .

Applications:
* 1999 E200 Kompressor
* 1997-2002 CLK230 Kompressor (C208)
* 1999-2002 C230 Kompressor (W202)
* 1998-2004 SLK230 Kompressor

Note: For the W210 E200 Kompressor from 1997 to 1999 the power output is .
Only the 1999 W210 E200 Kompressor received the .

M111.981

Similar to the 2.3L M111.974 engine, except supercharged.

Power .

Applications:
* 2002 C230 Kompressor

M111.983

It produces and .

Applications:

* 2000-2004 SLK230 Kompressor (R170)

M111.984

Power {{convert, 105, kW, PS hp, 0, abbr=on.

Applications:
* 1995-2006 Sprinter 214 / 314 / 414
* 1996-2001 Volkswagen LT 2.3
* 1996-1998 Ssangyong Musso 2.3

See also

* List of Mercedes-Benz engines

References

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

M111
Straight-four engines
Gasoline engines by model