Mercedes-Benz M111 engine

The M111 family is a straight-four automobile engine from Mercedes-Benz, produced from 1992 to 2003. Using the same cylinder block as the SOHC M102, it featured Dual-Overhead camshaft 4 valve per cylinder layout, pioneered by the Cosworth. In addition it brought variable valve timing and modern engine management fuel injection/ignition in place of the mechanical KE-Jetronic. Introduced in summer 1992 for the Mercedes-Benz W124, it would become the primary engine for the 1990s and into the early 2000s.

Originally available in aspirated form, it would introduce Supercharger (Kompressor) performance feature in 1996. In addition to powering Mercedes-Benz passenger and commercial vehicles, it would be used in several Volkswagen and Ssangyoung models.

As a member of the modular family of engines, similar refinements would take place in the six cylinder M104 petrol and 4-5-6 cylinder OM604-605-606 diesel engines with large interchangeability of parts and components.

E18

M111.920 / M111.921

The M111.920 is a 16 valve engine with bore and stroke of . 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 C 180 (W202)

E20

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: 1992–1997 E 200 (W124)

Unlike the M 102, the M 103, and early M 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.

M111.941 / M111.942 / M111.945 / M111.946

Similar to the M111.940 engine, used in the following years. It produces of power and of torque.

Applications:

M111.941: 1993–1996 C 200 (W202) M111.942: 1995–1999 E 200 (W210) M111.945: 1996–2000 C 200 (W202) 1997–2000 CLK 200 (C208) 1996–2000 E 200 (W210) M111.946: 1996–2000 SLK 200 (R170)

This motor never had PMS. Early models 1995 to 1997 has a HFM-motronic, hot-film type air/fuel metering device, and 1997 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.

M111.948 / M111.950

The power is , torque at 4200 rpm. Later model had of torque at 3600-4500 rpm.

Applications: M111.948: 1996–1999 V 200 (W638) M111.950: 1999–2003 V 200 (W638)

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 replacement intervals, connecting rods and pistons for higher compression ratio, fuel injection now Siemens SIM4, EuroIV emissions compliant, dual oxygen sensors.

Applications: 2000–2002 C 180 (W203) 2000–2002 C 180 SportCoupé (CL203) 2000–2003 V 200/Vito 113

A M111.952 variant of this engine was fitted to the final model year S202 (estate version) where it replaced the older 1.8l 122hp version for MY 2001. 2295 built from 06.2000 until 01.2001.

Applications: 2000–2001 C 180 (S202)

E20 ML

M111.943 / M111.944 / M111.947

The M111.943 and M111.944 are a 16-valve engines utilizing a supercharger similar to the 2.3L M111.973 engine. It produces of power and of torque. This engine was built especially to be 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. Early, 1995 iteration developed only .

Applications:

M111.943: 1996–2000 SLK 200 Kompressor (R170) M111.944: 1995–2000 C 200 Kompressor (W202) 1997–2000 CLK 200 Kompressor (C208) M111.947: 1997–2000 E 200 Kompressor (W210)

M111.955 / M111.956 / M111.957 / M111.958

M 111 E 20 ML EVO. This is a 2.0L Kompressor engine utilizing a supercharger (Eaton M45, black pulley) similar to the 2.3L M111.974 engine, but with a lower power output of and torque of @ 2500 rpm. EVO engine replaced the Eaton M62 supercharger with Eaton M45 unit. This engine was built for export to Italy, The Netherlands, Portugal, Turkey and Greece for tax reasons.

Applications:

M111.955: 2000–2002 C 200 Kompressor (W203) 2000–2002 C 200 Kompressor SportCoupé (CL203) M111.956: 2000–2003 CLK 200 Kompressor (C208) 2000–2001 C 200 Kompressor (S202) M111.957: 2000–2003 E 200 Kompressor (W210) M111.958: 2000–2004 SLK 200 Kompressor (R170)

E22

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: M111.960: 1992–1997 E 220 (W124) M111.961: 1993–1996 C 220 (W202)

E23

M111.970 / M111.974 / M111.978

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: M111.970: 1995–1998 E 230 (W210) M111.974: 1996–1998 C 230 (W202) M111.978: 1996–1999 V 230/Vito 114 М111.977: 1998-2000 ML 230 (W163) 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.

M111.979 / M111.980 / M111.984

The M111.979 is a 16-valve engine with bore and stroke of and compression ratio of 8.8:1. It produces @5000 rpm and a maximum torque of @4000 rpm.

Applications:

M111.979: 1995–2006 Sprinter 214 / 314 / 414 M111.980: 1999–2003 V 230 M111.984: 1995–2006 Sprinter 214 / 314 / 414 1996–2001 Volkswagen LT 2.3 1996–1998 Ssangyong Musso 2.3

M111.977

The M111.977 is a engine with compression ratio of 10.4:1. It produces and a maximum torque of .

Applications: 1998–2000 ML 230 (W163)

E23 ML

M111.973 / M111.975

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

Applications:

M111.973: 1996–2000 SLK 230 Kompressor (R170) 1997–2000 C 230 Kompressor (S202) M111.975: 1997–2000 CLK 230 Kompressor (C208) 1996–2000 C 230 Kompressor (W202)

M111.981 / M111.982 / M111.983

Similar to the 2.3L M111.974 engine, except supercharged. M 111 E 23 ML EVO. Power .

Applications: M111.981: 2001–2002 C 230 Kompressor SportCoupé (CL203) M111.982: 2000–2002 CLK 230 Kompressor (C208) M111.983: 2000–2004 SLK 230 Kompressor (R170)

Mercedes-Benz M111 engine

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