The M110 engine family is a

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

(

double overhead cam An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

)

crossflow cylinder head A crossflow cylinder head is a cylinder head that features the intake and exhaust ports on opposite sides. The gases can be thought to flow across the head. This is in contrast to reverse-flow cylinder head designs that have the ports on the same ...

design with 2 valves per cylinder

straight-6 The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine bal ...

automobile engine made by

Mercedes-Benz Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...

in the 1970s and 1980s. The M110.92x and .93x engines are carburetor engines, with

Solex Solex may refer to: * Solex (musician), Dutch musician * Solex Carburetor, a French manufacturer of carburetors and the powered bicycle VéloSoleX * Solex College, a former private for-profit college in Chicago, Illinois * Solex Unit, a fictiona ...

4A1

carburetor A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meteri ...

. The M110.98x and .99x engines are fuel-injected engines, with Bosch D-Jetronic up to the .983 and

K-Jetronic Jetronic is a trade name of a manifold injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations ...

from the .984. All M110 engines have a displacement of and a bore and stroke of .

Firing order The firing order of an internal combustion engine is the sequence of ignition for the cylinders. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated. In a diesel engi ...

is 1-5-3-6-2-4. Amount of coolant in the radiator was from 1972 and from 1980s and on. Amount of oil (lubricant) in engine was . Lubrication system was pressure circulation lubrication system. Number of valves was 1 intake, 1 exhaust with V-shaped overhead configuration, acted by rocker arms. Valve operation was 2 top camshafts and camshaft drive was duplex roller-type chain. The M110 .92x and .93x carburetor engines were replaced by the

SOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...

2.6L M103 while .98x and .99x fuel-injected engines were replaced by 3.0L M103 starting in 1986.

M110.921 / M110.931

The .931 is the low-compression version of the .921. *Power output of .921: at 5500 rpm. *Power output of .931: at 5500 rpm. Applications: * 1972-1976 280 (W114) * 1972-1976 280C (W114)

M110.922 / M110.932

The .932 is the low-compression version of the .922. Power output of .922: at 5500 rpm.
Power output of .932: at 5500 rpm. Applications: * 1972-1980 280S (W116)

M110.923

Power output: at 5500 rpm, or at 5500 rpm for the low-compression version. Applications: * 1975-1981 280 (W123) * 1975-1981 280C (W123)

M110.924

Power output: at 5500 rpm, or at 5500 rpm for the low-compression version. Applications: * 1979-1985 280S (W126)

M110.926

Power output: at 5500 rpm, or at 5500 rpm for the low-compression version. Applications: * 1979-1985 280S (W126)

M110.981 / M110.991

The M110.981 uses Bosch D-Jetronic injection. This system senses the ambient temperature, engine temperature, intake manifold underpressure and throttle valve position and ''calculates'' with an

analog computer An analog computer or analogue computer is a type of computer that uses the continuous variation aspect of physical phenomena such as electrical, mechanical, or hydraulic quantities (''analog signals'') to model the problem being solved. In c ...

how many milliseconds the fuel injectors should stay open per revolution. The .991 is the low-compression version of the .981. Power output of .981: at 6000 rpm and of torque at 4500 rpm.
Power output of .991: at 6000 rpm. Applications: * 1972-1976 280E (W114) * 1972-1976 280CE (W114)

M110.982 / M110.992

The .992 is the low-compression version of the .982. Power output of .982: at 6000 rpm.
Power output of .992: at 6000 rpm. Applications: * 1973-1976 Mercedes-Benz 280SL * 1973-1976 Mercedes-Benz 280SLC

M110.983 / M110.993

The .993 is the low-compression version of the .983. Power output of .983: at 6000 rpm.
Power output of .993: at 6000 rpm. Applications: * 1972-1975 280SE (W116) * 1972-1975 280SEL (W116)

M110.984

The M110.984 was the first engine with the new Bosch K-Jetronic injection. This system is mechanical. The air that is taken in is weighed to then determine the amount of fuel to inject. Power output: at 6000 rpm up to April 1978; at 5800 rpm from April 1978. Applications: * 1975-1981 280E (W123) * 1975-1981 280CE (W123) * 1975-1981 280TE (W123)

M110.985

Power output: at 6000 rpm up to April 1978; at 5800 rpm from April 1978. Applications: * 1976-1980 280SE (W116) * 1976-1980 280SEL (W116)

M110.986

Power output: at 6000 rpm up to April 1978; at 5800 rpm from April 1978. Applications: * 1976-1985 280SL (R107) * 1976-1981 280SLC (C107)

M110.987

Power output: at 5800 rpm. Maximum torque: at 4500 rpm. Compression ratio: 9.0:1 Applications: * 1979-1985 280SE (W126) * 1979-1985 280SEL (W126)

M110.988

Maximum output was at 5800 rpm
Maximum torque was at 4500 rpm
The compression ratio was 9.0:1. Applications: * 1978-1986 280E (W123) * 1978-1986 280TE (W123) * 1978-1986 280CE (W123)

M110.989

Power output: at 5800 rpm.
Maximum torque: at 4500 rpm.
The compression ratio: 9.0:1. Applications: * 1981.10-1985 280SE (W126) * 1981.10-1985 280SEL (W126)

M110.990

Power output: at 5800 rpm. Applications: * 1976-1985 280SL (R107) * 1976-1981 280SLC (C107)

M110.994

This engine was specifically produced for the G-Class Geländewagen. It has a low compression ratio. It uses K-Jetronic. Power output: at 5250 rpm up to 1984; at 5250 rpm from 1984. Torque: at 4250 rpm. Applications: * 1979-1989 280GE (W460)

M110.998/995 by AMG

Own tuning version of the 2.7-liter M110 engine was presented at the end of the 70s by the then independent AMG division for the W123 models (sedan, coupe and station wagon) and W116 in long and short body versions. After modifications by specialists from

Affalterbach Affalterbach is a municipality in the Ludwigsburg district in Baden-Württemberg, Germany. History Affalterbach became a possession of the County of Württemberg in 1322 and was placed under the jurisdiction of Marbach am Neckar. As it sat on t ...

, the power of naturally aspirated engine increased from the standard and of torque up to and . Applications: * 1979–1981

Mercedes-Benz W123 The Mercedes-Benz W123 is a range of executive cars produced by German manufacturer Mercedes-Benz from November 1975 to January 1986. The W123 models surpassed their predecessor, the Mercedes-Benz W114, as the most successful Mercedes, selling 2. ...

by AMG ( 280E/280TE/280CE) * 1979–1981

Mercedes-Benz W116 The Mercedes-Benz W116 is a series of flagship luxury sedans produced from September 1972 until 1980. The W116 automobiles were the first Mercedes-Benz models to be officially called S-Class, although earlier sedan models had already unofficiall ...

by AMG ( 280SE/280SEL)

References

* Mercedes-Benz "Werkstatt-Literatur Type 107" repair manual CD, page "M110 Motoren- und Typenübersicht" {{DEFAULTSORT:Mercedes-Benz M110 Engine M110 Straight-six engines Gasoline engines by model