Mercedes-Benz M104 engine

M104
Overview
ManufacturerMercedes-Benz AG
Production1988–1999
Layout
ConfigurationStraight-6 (Except M104.900, refer VW VR6)
Displacement2.8 L; 170.8 cu in (2,799 cc) M104.94x
3.0 L; 180.6 cu in (2,960 cc) M104.98x
3.2 L; 195.2 cu in (3,199 cc) M104.99x
Cylinder block materialCast iron
Cylinder head materialAluminium
ValvetrainDOHC 4 valves x cyl. with VVT
Compression ratio9.2:1, 10:1 and 10.5:1 on AMG models
Combustion
Fuel systemBosch KE-Jetronic (KE-CIS)

Bosch LH-Jetronic (LH-SFI)

Bosch Motronic (HFM-SFI)
ManagementElectronic
Fuel typeGasoline
Oil systemWet sump
Cooling systemWater cooled
Output
Power output193–280 PS (142–206 kW; 190–276 hp) SAE
Torque output265–385 N⋅m (195–284 lb⋅ft) at 4600 rpm M104.98x
Chronology
PredecessorM 103
SuccessorM 112

The Mercedes-Benz M104 is a automobile straight-six engine produced from 1988 through 1999. It has a double overhead cam design with 4 valves per cylinder, and used a crossflow cylinder head. It replaced the M103 and was replaced by the M112 V6 starting in 1997. The bore spacing on all M104 engines is the same as M103 engines.

2.8 L M104.900

As Mercedes needed a compact 6-cylinder for their Vito, they agreed with Volkswagen to use their VR6 engine, which they then designated M104.900.[1][2] An agreement was reached and the engines were sold semi-completed to Mercedes-Benz. This version is unrelated to other engines designated M104. Only the engine cover and aircleaner housing is by Mercedes-Benz.

3.0 L M104.98x

This 3.0 L (2,960 cc) 24v was introduced as a sports car resp. top model completing the line-up of M103 12V engines. The M104 featured dual overhead camshafts and four valves per cylinder. The M103 and M104.98x were later replaced by the 2.8-litre and 3.2-litre versions of the M104.

The 3.0 L (2,960 cc) M104 featured KE-Jetronic fuel injection, cylinder specific ignition-timing, variable valve timing and under-piston cooling jets.

Specifications
Applications

2.8 L M104.94x

In 1993, two capacities replaced the 3.0 litre: a 2.8 L; 170.8 cu in (2,799 cc) replaced the old single-cam M103 engine and the 3.2 litre M104.99x replaced the double-cam M104.98x. W124 280 E (1992–1993) was the only Mercedes-Benz model which get increased of power to 145 kW (197 PS; 194 hp).[13][14][15][16][17][18][19][20]

Specifications for 2.8 L
Applications

3.2 L M104.99x

For the 3.2 L (3,199 cc), the compression ratio is the same 10.0:1 on all W210, R129, and W140 but it did differ from 9.2:1 to 10.0:1 on W124 (M104.992).[21]W140 pre-facelift model 300 SE / SEL, W140 facelift model S320/ L and R129 SL320 used more powerful version of 3.2-liter M104 engine which produced 170 kW (231 PS; 228 hp).[22][23][24][25][26][27][28][29][30][31]

Specifications
  • Engine power @ 5500 rpm: 162 kW (220 PS; 217 hp) or 170 kW (231 PS; 228 hp)
  • Torque @ 3750 rpm: 310 N⋅m (229 lb⋅ft) or 315 N⋅m (232 lb⋅ft)
  • Bore and stroke: 89.9 mm × 84 mm (3.54 in × 3.31 in)
  • Compression ratio: 9.2:1 to 10.0:1
  • Intake valves: 35 mm (1.4 in)
  • Exhaust valves 31 mm (1.2 in)
  • Starter motor: 1.7 kW electrical motor
  • Ignition system: electronic ignition system
Applications

AMG 3.4 (3.3 L)

There were 3.3 L conversions done to the 3.0 L M104.980 by AMG, prior to their formal cooperation with Daimler Benz.

AMG developed a 3.3 L M104 that was used principally in the 300E AMG 3.4, AMG 3.4 CE and 300TE-3.4 AMG (Mercedes-Benz W124) vehicles, produced between 1988-1993. A few of these engines were originally installed in the SL 3.4 AMG.

Specifications for AMG 3.4 (3.3 L)

AMG 3.6 L M104.941/M104.992

There were 3.6 L conversions done to both the M103 and M104 by Brabus, among others.

AMG developed a 3.6 L; 220.1 cu in (3,606 cc) M104 that was used in the W202 C36 AMG (W202) from M104.941, the W124 E36 AMG (W124) from M104.992, the E36 AMG (W210), and the G36 AMG (W463) vehicles.

The AMG 3.6 M104 was rated at 276 hp (206 kW; 280 PS) at 5,750 rpm and 284 lb⋅ft (385 N⋅m) of torque at 4,000 rpm using the HFM engine management system. Bore and stroke is 91 mm × 92.4 mm (3.58 in × 3.64 in) with a compression ratio of 10.5. AMG later conceded that since the engine was hand modified, power outputs could vary slightly from 276 to 287 hp (206 to 214 kW; 280 to 291 PS).

The boost in displacement was obtained by boring the 2.8 litre M104 block by 2.1 mm (0.083 in) and using a highly modified version of the crankshaft from the 3.5L OM603 to increase throw by 18.9 mm (0.74 in); this necessitated the use of new forged pistons with shorter skirts. A larger intake crossover pipe, free-flowing exhaust, a unique intake camshaft, minor changes to the cylinder head, and modifications to the HFM fuel computer also contribute to the increase in power.

Ssangyong (South Korean brand) made a 3.6 litre variant of the M104 inline-six engine based on the 2.8 litre model, producing 248 hp (185 kW; 251 PS) or 276 hp (206 kW; 280 PS) on earlier versions, for its Chairman model, a full-size luxury sedan. Chinese car Roewe R95L which based on SsangYong Chairman also uses a 3.6 litre version of the M104 engine.

Last versions of the German sports car Isdera Spyder 036i after 1990 also use 3.6 litre AMG variant of M104, producing 268 (200 kW; 272 PS) or 282 hp (210 kW; 286 PS).

AMG 3.6 Liter M104 in a W124 E36T AMG

Turbo Conversions

Turbocharger kits were offered for both the M103 and M104 engines by Turbo Technics, Mosselman, Lotec, MAD Modify, Turbobandit and other tuners. These conversions typically raised engine output to between 300 and 800 PS (221 and 588 kW; 296 and 789 hp), depending on Boost Target. During the 1990s UK customers were able to buy new vehicles equipped with a Turbo Technics conversion directly from Mercedes dealer Hughes of Beaconsfield (limited run of 75 conversions). Today turbocharger kits for M103-M104 engines are available from later tuners in Europe and Asia.

References

Notes

  1. ^ "MERCEDES BENZ V-Klasse (W638) specs & photos - 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003". autoevolution. Retrieved 2020-09-03.
  2. ^ "V 280". marsClassic (in German). Retrieved 2020-09-03.
  3. ^ "300 SL-24". marsClassic. Retrieved 2023-02-15.
  4. ^ "Road test -- Mercedes-Benz 300SL-24". Motor Sport Magazine. 2 March 2016. Retrieved 2023-02-15.
  5. ^ "Greatest road tests ever: Mercedes-Benz 300SL-24". Autocar. Retrieved 2023-02-15.
  6. ^ "Mercedes-Benz 300 SL-24 Manual 2 doors tech specs". Cars-Data.com. Retrieved 2023-02-15.
  7. ^ "Mercedes-Benz 300 SL-24 :: 1 photo and 62 specs :: autoviva.com". www.autoviva.com. Retrieved 2023-02-15.
  8. ^ Wilson, Lori (2023-01-13). "The Last Manual Transmission Mercedes-Benz SL Catches Doug DeMuro Off Guard". HotCars. Retrieved 2023-02-15.
  9. ^ "Detailed specs review of 1992 Mercedes-Benz 300 SL-24 model for Europe". www.automobile-catalog.com. Retrieved 2023-02-15.
  10. ^ "Specifikationer för Mercedes-Benz 300 SL-24 R129". car.info (in Swedish). Retrieved 2023-02-15.
  11. ^ Niederle, Pavel. "Mercedes Benz M104.981 engine (3.0, 170 kW)". Mercedes Benz club. Retrieved 2023-02-15.
  12. ^ "Mercedes-Benz 300SL 24V 3.0 W129 Series (3.0) - Mercedes 300 SL 24V (3.0) - 2960 - Enginerebuilding.eu". www.enginerebuilding.eu. Retrieved 2023-02-15.
  13. ^ "1992 Mercedes-Benz 280 E Automatic W 124 specifications, technical data, performance". www.carfolio.com. Retrieved 2023-02-23.
  14. ^ "Mercedes-Benz 280 (W124) 280 E (197 Hp)". AutoData1. Retrieved 2023-02-23.
  15. ^ "Mercedes-Benz 280 E 197hp, 1992". car.info. Retrieved 2023-02-23.
  16. ^ "Mercedes-Benz 280 (W124) 280 E (197 Hp) 1992, 1993 specifications, prices & reviews". xezii.com. Retrieved 2023-02-23.
  17. ^ "Mercedes-Benz 280 280 (W124) • 280 E (197 Hp) technical specifications and fuel consumption — AutoData24.com". autodata24.com. Retrieved 2023-02-23.
  18. ^ "Detailed specs review of 1992 Mercedes-Benz 280 E automatic 4-speed offered since September 1992 for Europe". www.automobile-catalog.com. Retrieved 2023-02-23.
  19. ^ Cars-Directory.NET. "Mercedes-Benz W124 (facelift 1989) 280 E (197 Hp) Automatic 1992 - 1993 Specs and Technical Data, Fuel Consumption, Dimensions". Cars-Directory.NET. Retrieved 2023-02-23. {{cite web}}: |last= has generic name (help)
  20. ^ "Technical specs Mercedes-Benz 280". cararac.com. Retrieved 2023-02-23.
  21. ^ "M104 3.2L Engine Specifications And Review on MotorReviewer.com". www.motorreviewer.com. Retrieved 2020-08-24.
  22. ^ "Detailed specs review of 1995 Mercedes-Benz SL 320 offered since September 1995 for Europe". www.automobile-catalog.com. Retrieved 2023-02-26.
  23. ^ "1993 Mercedes-Benz SL (R129) SL 320 (231 Hp) Automatic | Technical specs, data, fuel consumption, Dimensions". www.auto-data.net. Retrieved 2023-02-26.
  24. ^ "Mercedes Benz SL (R129) 320 Technical Specs, Fuel Consumption, Dimensions". www.ultimatespecs.com. Retrieved 2023-02-26.
  25. ^ "1993-1998 Mercedes SL 320 R129 Specs & Performance, Ranks & Comparisons 🚘". encyCARpedia. Retrieved 2023-02-26.
  26. ^ Cars-Directory.NET. "Mercedes-Benz SL (R129) SL 320 (231 Hp) Automatic 1993 - 1995 Specs and Technical Data, Fuel Consumption, Dimensions". Cars-Directory.NET. Retrieved 2023-02-26. {{cite web}}: |last= has generic name (help)
  27. ^ "Mercedes Benz W140 Class S 320 Technical Specs, Fuel Consumption, Dimensions". www.ultimatespecs.com. Retrieved 2023-02-26.
  28. ^ "1993 Mercedes-Benz S-class (W140) S 320 (231 Hp) 4 Automatic | Technical specs, data, fuel consumption, Dimensions". www.auto-data.net. Retrieved 2023-02-26.
  29. ^ Cars-Directory.NET. "Mercedes-Benz S-class (W140) S 320 (231 Hp) Automatic 1993 - 1998 Specs and Technical Data, Fuel Consumption, Dimensions". Cars-Directory.NET. Retrieved 2023-02-26. {{cite web}}: |last= has generic name (help)
  30. ^ "1993-1998 Mercedes S 320 W140 Specs & Performance, Ranks & Comparisons 🚘". encyCARpedia. Retrieved 2023-02-26.
  31. ^ "Detailed specs review of 1993 Mercedes-Benz 300 SE offered since mid-year 1992 for North America U.S." www.automobile-catalog.com. Retrieved 2023-02-26.

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