Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals

Mercedes M102 Petrol Engine Manuals

The Mercedes-Benz M102 petrol engine was produced in 5 displacements of 1.8 L 1797cc, 2.0 L 1997cc,  2.3 L 2299cc, 2.5 L 2463cc and 2498cc, produced 1979 to 1996

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Download: Mercedes M102 E 2.3 Engine Service Manual

Mercedes M102 Engine Service Repair ManualMercedes M102 E 2.3 (8/16 #-Valves)
Manual Covers Engine Variations 102.983, 102.985, 102.961
Use as reference for other variations -
W123 W124, W201, W460, W461, W463, etc.
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M102 Engine Technical Data

The Mercedes-Benz M102 engine is a straight inline 4-cylinder gasoline motor that was used through the 1980's and early 1990's, beginning in late 1979 as a replacement for the M115 4-cylinder engine.

The M102 engine originally featured a cast iron cylinder block, aluminum 8-valve cylinder head, single camshaft and single row timing chain.

In 1984 the M102 engine was updated with new light weight connecting rods and crankshaft along with hydraulic tappets, lifters and a new style oil filter.

In 1987 the M102 2.0 liter motors original single-strand timing chain which had proved to be very unreliable, was upgraded to a more durable double-row timing chain.

Production of the Mercedes-Benz M102 petrol motor ended in 1994 as it was being replaced by the new 2.0-liter M111 engine.

Mercedes-Benz M102 2.3 Liter 16 Valve Engine

Production Specifications

Cam CCM Type Vlv Comp kW Nm Bore x Stroke Produced
M102.910 (1-cam) M102  
OHC 1797 4 In-Line 8 9.1 : 1 80 150 89 x 72.2 1990 - 1994
M102.920 (1-cam) M102  
OHC 1997 4 In-Line 8 9 : 1 80 170 89 x 80.25 1979 - 1986
M102.921 (1-cam) M102  
OHC 1996 4 In-Line 8 9 : 1 66 170 89 x 80.25 1982 - 1984
M102.922 (1-cam) M102  
OHC 1996 4 In-Line 8 9.1 : 1 80 170 89 x 80.25 1984 - 1990
M102.923 (1-cam) M102  
OHC 1996 4 In-Line 8 9.1 : 1 87 172 89 x 80.25 1988 - 1992
M102.924 (1-cam) M102  
OHC 1997 4 In-Line 8 9 : 1 75 158 89 x 80.25 1984 - 1993
M102.938 (1-cam) M102  
OHC 1996 4 In-Line 8 8 63     1982-1984
M102.939 (1-cam) M102  
OHC 1996 4 In-Line 8 8 74     1980-1985
M102.942 (1-cam) M102  
OHC 2299 4 In-Line 8 9.1 : 1 70 170 95.5 x 80.25 1982 - 1988
M102.961 (1-cam) M102  
OHC 1997 4 In-Line 8 9.1 : 1 90 178 89 x 80.25 1982 - 1993
M102.962 (1-cam) M102  
OHC 1997 4 In-Line 8 9.1 : 1 87 172 89 x 80.25 1982 - 1991
M102.963 (1-cam) M102  
OHC 1997 4 In-Line 8 9.1 : 1 87 172 89 x 80.25 1984 - 1995
M102.964 (1-cam) M102  
OHC 1997 4 In-Line 8 9.1 : 1 87 172 89 x 80.25 1984 - 1995
M102.965 (1-cam) M102  
OHC 1997 4 In-Line 8 9.1 : 1 87 172 89 x 80.25 1990 - 1994
M102.980 (1-cam) M102  
OHC 2299 4 In-Line 8 9 : 1 100 205 95.5 x 80.25 1979 - 1986
M102.981 (1-cam) M102  
OHC 2299 4 In-Line 8 9 : 1 92 205 95.5 x 80.25 1982 - 1989
M102.982 (2-cam) M102  
OHC 2299 4 In-Line 8 9 : 1 100 205 95.5 x 80.25 1985 - 1993
M102.983 (1-cam) M102 16v  
DOHC 2299 4 In-Line 16 10.5 : 1 136 240 95.5 x 80.3 1984 - 1993
M102.985 (1-cam) M102  
OHC 2299 4 In-Line 8 9 : 1 97 198 95.5 x 80.25 1985 - 1992
M102.987 (1-cam) M102  
OHC 2299 4 In-Line 8 9 : 1 92 205 95.5 x 80.25 1985 - 1992
M102.990 (1-cam) M102 16v  
DOHC 2498 4 In-Line 16 9.7 : 1 143 235 95.5 x 87.2 1988 - 1993
M102.991 (1-cam) M102 16v Evolution I  
DOHC 2498 4 In-Line 16 9.7 : 1 173 235 95.5 x 87.2 1989 - 1993
M102.992 (1-cam) M102 16v Evolution II  
DOHC 2463 4 In-Line 16 10.5 : 1 173 245 97.3 × 82.8 1990 - 1993

Mercedes Benz M102 Motor

Engine Code Modifications

1.8 Liter Engine

  • M102.910 (1990-) Applications: 1990–1993 W201 180E and 190E 1.8

2.0 Liter Engine E20

  • M102.920 (1980 - 1986) - first carburetor version 109 hp at 5200 rpm, torque 170 Nm at 3000 rpm. Carburetor Stromberg 175 CDT, compression 9, application W123.
  • M102.921 (1982 - 1984) - different cam and Stromberg 175CD carburetor, 90 hp at 5000 rpm, torque 165 Nm at 2500 rpm. Used in 190 W201.
  • M102.922 (1985 - 1990) - revised .920 light connecting rods, crankshaft and Stromberg 175 CDT carburetor, 1986+ Pierburg 2 EE carb. 109 hp at 5500 rpm, torque 170 Nm at 3000 rpm. . Application W124.
  • M102.924 (1984 - 1991) - modified .921 light connecting rods, crankshaft and Stromberg 175 CDT, after 1986+ Pierburg 2 EE carb. 109 hp at 5500 rpm, torque 170 Nm at 3000. Application W124, 190 W201.
  • M102.938 (1982 - 1984) - analog of .921, compression reduced to 8, power dropped to 86 hp. Used in 190 W201.
  • M102.939 (1980 - 1985) - analog of .920, compression reduced to 8, power dropped to 101 hp. Used in W123.
  • M102.962 (1982 - 1993) - analogue of .921 Bosch KE-Jetronic injection, compression 9, power 122 hp at 5500 rpm, torque 178 Nm at 3500 rpm. Used in 190 W201.
  • M102.963 (1985 - 1992) - analogue of .921 Used in W124.
  • M102.964 (1986 - 1991) - analogue of .921 Used in Gelandewagen W460.
  • M102.965 (1990 - 1994) - analogue of .921 crankshaft with piston stroke 80.2 mm, volume 1996 cm³. Used in Gelandewagen W463.

2.3 Liter Engine E23 / V23

  • M102.942 / M102.945 (1982 - 1986) Carburetor Pierburg 1B1, 95 hp at 5200 rpm, torque 170 Nm at 2500 rpm, compression 9. Used in T1 and T2.
  • M102.944 (1986 - 1989) Carburetor Stromberg 175 CDTU carburetor, 109 hp at 5300 rpm, torque 174 Nm at 2000 rpm, Used in Gelandewagen
  • M102.946 (1989 - 1995) - Carburetor Pierburg, power 105 hp at 5100 rpm, torque 182 Nm at 2000 rpm. Used in T1 and T2.
  • M102.980 (1980 - 1986) - 2.3 liter, Bosch K-Jetronic fuel injection, power 136 hp at 5100 rpm, torque 205 Nm at 3500 rpm, compression 9. Used in W123.
  • M102.981 (1982 - 1985) - analog version power 125 hp at 5000 rpm, torque 192 Nm at 4000 rpm, compression 9, Used in Gelandewagen W460,,.
  • M102.982 (1985 - 1992) - modified M102.980, Bosch KE-Jetronic injection, power 132 hp at 5100 rpm, torque 198 Nm at 3500 rpm. compression 9, Used in W124.
  • M102.983 (1983 - 1988) - sports version 16-valve Cosworth cylinder head, Bosch KE-Jetronic injection, power 185 hp at 6200 rpm, torque 235 Nm at 4500 rpm, compression 10.5, ECE. Since 1985 RUF, compression 9.7, power reduced to 177 hp at 5800 rpm, torque 230 Nm at 4750 rpm. Since 1985, Used in W201.
  • M102.985 (1984 - 1993) - analogue of M102.982, power 132 hp at 5100 rpm, torque 198 Nm at 3500 rpm, Compression 9, Used in W201.
  • M102.987 (1986 - 1991) - analogue of M102.981, Bosch KE-Jetronic injection, power 125 hp at 5000 rpm, torque 192 Nm at 4000 rpm, crankshaft with stroke of 80.2 mm (2298 cm³), compression 9, Used in Gelandewagen W460.
  • M102.989 (1990 - 1994) - analogue of M102.987, power 126 hp at 5000 rpm, torque 190 Nm at 4000 rpm, Used in Gelandewagen W463.
  • M102.979 (1990 - 1994) - analog of M102.987, power 122 hp at 5100 rpm, 188 Nm of torque at 4000 rpm, Used in Gelandewagen W461.

Vehicle Applications

  • 1980-1985  230 CE Coupé
  • 1986-1992  230 CE Coupé
  • 1990-1992  200 CE Coupé
  • 1979-1986  230 TE Wagon
  • 1980-1986  200 T Wagon
  • 1985-1990  200 T Wagon
  • 1985-1992  230 TE Wagon
  • 1988-1992  200 TE Wagon
  • 1979-1985  230 E Sedan
  • 1980-1985  200 Sedan
  • 1984-1992  230 E Sedan
  • 1985-1989  200 Sedan
  • 1985-1992  200 E Sedan
  • 1990  200 Sedan
  • 1983-1984  190 Sedan
  • 1983-1988  190 E Sedan
  • 1984  190 E 2.3 Sedan
  • 1985-1988  190 Sedan
  • 1985  190 E 2.3 Sedan
  • 1985-1988  190 E 2.3-16 Sedan
  • 1986-1988  190 E 2.3 Sedan
  • 1989-1991  190 Sedan
  • 1989-1990  190 E Sedan
  • 1989-1993  190 E 2.3 Sedan
  • 1989-1993  190 E 2.5-16 Sedan
  • 1989  190 E 2.5-16 Evolution Sedan
  • 1990-1993  190 E 1.8 Sedan
  • 1990  190 E 2.5-16 Evolution II Sedan
  • 1991-1993  190 E 2.0 Sedan
  • 1982-1985  230 GE Cabriolet
  • 1982-1985  230 GE Wagon
  • 1982-1985  230 GE Van
  • 1982-1985  230 GE LWB Wagon
  • 1982-1985  230 GE LWB Van
  • 1986-1991  200 GE Wagon
  • 1986-1991  200 GE Cabriolet
  • 1986-1991  200 GE LWB Wagon
  • 1986-1989  230 G Cabriolet
  • 1986-1989  230 G Wagon
  • 1986-1989  230 G Van
  • 1986-1989  230 G LWB Van
  • 1986-1989  230 G LWB Wagon
  • 1986-1991  230 GE Van
  • 1986-1991  230 GE Wagon
  • 1986-1991  230 GE Cabriolet
  • 1986-1991  230 GE LWB Wagon
  • 1986-1991  230 GE LWB Van
  • 1993  230 GE Wagon
  • 1993  230 GE LWB Wagon
  • 1993  230 GE LWB Pickup
  • 1993  230 GE LWB Van
  • 1994-1996  G 230 Wagon
  • 1994-1996  G 230 LWB Pickup
  • 1994-1996  G 230 LWB Van
  • 1994-1996  G 230 LWB Wagon
  •  

Version Applications

  • M102.910 Applications: 1990-1993 W201 180E and 190E 1.8
  • M102.920 Applications: W123 S123 200, 200T, V 20
  • M102.921 Applications: 1983-1985 W201 190 (201.022)
  • M102.922 Applications: 1985-1992 W124 200, V 20
  • M102.924 Applications: 1986-1990 W201 190 (201.023)
  • M102.938 Applications: W201 190
  • M102.939 Applications: W123 200, 200T
  • M102.961 Applications: 1983-1985 W201 190E
  • M102.962 Applications: 1985-1993 W201 190E
  • M102.963 Applications: 1985-1992 W/C124 200E, W201 190e, 200 CE/Automatic
  • M102.964 Applications: 1986-1989 W460 200GE 2.0 L.
  • M102.980 Applications: W/S/C123 E 23 230E, 230CE, 230TE/Automatic,
  • M102.981 Applications: 1979-1989 W460 230GE Geländewagen
  • M102.982 Applications: W/S/C124 E 23 230E, 230CE/Automatic, 230TE/Automatic
  • M102.983 Applications: 1986-1987 W201 190E 2.3-16
  • M102.985 Applications: 1985-1992 W201 190 E 2.3
  • M102.990 Applications: 1988-1993 W201 190E 2.5-16
  • M102.991 Applications: 1989 W201 190E 2.5-16 Evolution I
  • M102.992 Applications: 1990 W201 190E 2.5-16 Evolution II
Mercedes-Benz M102 2.0 Liter Engine