The M111.920 is a 16 valve engine. 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 -sensor instead of MAP-sensor on the first one, and using ECU instead of PMS. Applications:
Unlike the 102, 103, and early 104 series engines, the engine did not use mechanical fuel injection but the Siemens PEC/PMS 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. Injectors work in pairs, or altogether. It uses 2 ignition coils and no ignition distributor. Cylinders are fired in pairs - 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
1993-2000 C200
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
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:
EVO engine. Naturally aspirated, compression ratio is 10.6:1. The power is, torque -. Improvement includes reinforced cylinder block, new cylinder head, individual coils and new sparkplugs, connecting rods and pistons for higher compression ratio, fuel injection improvements. Applications:
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:
