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Mercedes-Benz M104 engine

Mercedes-Benz M104 engine
FieldValue
nameMercedes-Benz M104
imageMercedes-Benz, Techno-Classica 2018, Essen (IMG 9644).jpg
manufacturerMercedes-Benz AG
production1988–1999
predecessorM 103
successorM 112
configurationStraight-6 (Except M104.900, refer VW VR6)
displacement2799 cc M104.94x
2960 cc M104.98x
{{convert3199ccL cuin1abbrondisp=flip}} M104.99x
blockCast iron
headAluminium
valvetrainDOHC 4 valves x cyl. with VVT
compression9.2:1, 10:1 and 10.5:1 on AMG models
fuelsystemBosch KE-Jetronic (KE-CIS)
managementElectronic
fueltypeGasoline
oilsystemWet sump
coolingsystemWater cooled
power193-280 PS SAE
torque265-385 Nm at 4600 rpm M104.98x

2960 cc M104.98x

3199 cc M104.99x Bosch LH-Jetronic (LH-SFI) Bosch Motronic (HFM-SFI)

The Mercedes-Benz M104 is an 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. 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 air cleaner housing is by Mercedes-Benz.

3.0 L M104.98x

This 2960 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 2960 cc M104 featured KE-Jetronic fuel injection, cylinder specific ignition-timing, variable valve timing and under-piston cooling jets.

;Specifications

  • Engine power at 6400 rpm or 6300 (300SL-24): 217 to (without catalytic converter). Version R129 300SL-24 has 170 kW 272 Nm version of 3-liter M104 engine.
  • Torque at 4600 rpm: 265 Nm or 272 Nm (without catalytic converter)
  • Bore and stroke: 88.5x80.2 mm
  • Compression ratio: 10:1

;Applications

  • 1989–1992 C124 300 CE-24
  • 1992–1993 A124 300 CE-24
  • 1989–1993 R129 300 SL-24
  • 1989–1992 W124 300 E-24
  • 1989–1992 S124 300 TE-24
  • 1987–1993 Isdera Spyder 036i 3.0-24V

2.8 L M104.94x

In 1993, two capacities replaced the 3.0 litre: a 2799 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.

;Specifications for 2.8 L

  • Engine power at 5500 rpm: 142 kW or 145–148 kW (197 PS; 195 hp/201PS; 199 hp) on SsangYong models
  • Torque at 3750 rpm: 270 Nm or 271–277 N·m (199–204 lb·ft) on SsangYong models
  • Bore and stroke: 89.9x73.5 mm
  • Compression ratio:
  • Redline:
  • Firing order: --
  • Lubrication system: pressure circulation
  • Oil capacity: 7.0 L
  • Coolant capacity: 9 L
  • Camshaft drive: duplex roller chain
  • Starter motor: 1.7 kW electrical motor
  • Ignition system: ignition mapping control

;Applications

  • 1993–1997 W202 C 280
  • 1995–1997 W210 E 280
  • 1992–1995 W124 280 E / E 280
  • 1992–1998 W140 300 SE 2.8 / S 280
  • 1993–1998 R129 SL 280
  • 1997–2004 W124 SsangYong Chairman H CM500S
  • 2003–2006 Y200 SsangYong Rexton I RX 280

3.2 L M104.99x

For the 3199 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).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.

;Specifications

  • Engine power at 5500 rpm: 162 kW or 170 kW
  • Torque at 3750 rpm: 310 Nm or 315 Nm
  • Bore and stroke: 89.9x84 mm
  • Compression ratio: 9.2:1 to 10.0:1
  • Intake valves: 35 mm
  • Exhaust valves 31 mm
  • Starter motor: 1.7 kW electrical motor
  • Ignition system: electronic ignition system

;Applications:

  • Mercedes-Benz
    • 1992–1995 W124 320 E / E 320
    • 1992–1996 S124 320 TE & C124 320 CE / E 320
    • 1992–1997 A124 320 CE / E 320
    • 1995–1997 W210 E 320
    • 1991–1998 W140 300 SE & V140 300 SEL / S 320
    • 1993–1998 R129 SL 320
    • 1994–1997 W463 G 320
  • Roewe
    • 2011–2017 W5
    • 2008–2009 R95
  • SsangYong
    • 1997-2017 Chairman
    • 1996-2006 Korando
    • 2007-2014 Kyron
    • 1993–1999 Musso
    • 2001–2006 Rexton Y200
    • 2004–2013 Rodius
  • Heuliez
    • 1996 Intruder
  • Status & Class
    • 1999 OPAC Contender XG

AMG 3.4 (3.3 L)

There were 3.3 L conversions done to the 3.0 L M104.980 by AMG, during the early 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 1990 and 1992. A few of these engines were originally installed in the SL 3.4 AMG.

;Specifications for AMG 3.4 (3.3 L)

  • Engine power: 200 kW at 6500 rpm
  • Torque: 330 Nm at 4500 rpm
  • Bore and stroke: 91.5x84 mm
  • Lubrication system: pressure circulation
  • Oil capacity: 7.5 L
  • Coolant capacity: 9 L
  • Starter motor: 1.7 kW electrical motor
  • Ignition system: Bosch KE-Jetronic (CIS-E) injection

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 3606 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.

AMG 3.6 liter M104 in a W124 E36T AMG

The AMG 3.6 M104 was rated at 276 hp at 5,750 rpm and 284 lbft of torque at 4,000 rpm using the HFM engine management system. Bore and stroke is 91x92.4 mm 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.

The boost in displacement was obtained by boring the 2.8 litre M104 block by 2.1 mm and using a highly modified version of the crankshaft from the 3.5L OM603 to increase throw by 18.9 mm; 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 or 276 hp on earlier versions, for its Chairman model, a full-size luxury sedan. The Chinese Roewe R95L, based on the 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 a 3.6 litre AMG variant of the M104, producing 268 (200 kW; 272 PS) or 282 hp (210 kW; 286 PS).

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, 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

References

  1. "MERCEDES BENZ V-Klasse (W638) specs & photos - 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003".
  2. "V 280".
  3. "300 SL-24".
  4. (2 March 2016). "Road test -- Mercedes-Benz 300SL-24".
  5. "Greatest road tests ever: Mercedes-Benz 300SL-24".
  6. "Mercedes-Benz 300 SL-24 Manual 2 doors tech specs".
  7. "Mercedes-Benz 300 SL-24 :: 1 photo and 62 specs :: autoviva.com".
  8. Wilson, Lori. (2023-01-13). "The Last Manual Transmission Mercedes-Benz SL Catches Doug DeMuro Off Guard".
  9. "Detailed specs review of 1992 Mercedes-Benz 300 SL-24 model for Europe".
  10. "Specifikationer för Mercedes-Benz 300 SL-24 R129".
  11. Niederle, Pavel. "Mercedes Benz M104.981 engine (3.0, 170 kW)".
  12. "Mercedes-Benz 300SL 24V 3.0 W129 Series (3.0) - Mercedes 300 SL 24V (3.0) - 2960 - Enginerebuilding.eu".
  13. "1992 Mercedes-Benz 280 E Automatic W 124 specifications, technical data, performance".
  14. "Mercedes-Benz 280 (W124) 280 E (197 Hp)".
  15. "Mercedes-Benz 280 E 197hp, 1992".
  16. "Mercedes-Benz 280 (W124) 280 E (197 Hp) 1992, 1993 specifications, prices & reviews".
  17. "Mercedes-Benz 280 280 (W124) • 280 E (197 Hp) technical specifications and fuel consumption — AutoData24.com".
  18. "Detailed specs review of 1992 Mercedes-Benz 280 E automatic 4-speed offered since September 1992 for Europe".
  19. Cars-Directory.NET. "Mercedes-Benz W124 (facelift 1989) 280 E (197 Hp) Automatic 1992 - 1993 Specs and Technical Data, Fuel Consumption, Dimensions".
  20. "Technical specs Mercedes-Benz 280".
  21. "Reduction of Engine Oil Fill Capacity".
  22. "M104 3.2L Engine Specifications And Review on MotorReviewer.com".
  23. "Detailed specs review of 1995 Mercedes-Benz SL 320 offered since September 1995 for Europe".
  24. "1993 Mercedes-Benz SL (R129) SL 320 (231 Hp) Automatic {{!}} Technical specs, data, fuel consumption, Dimensions".
  25. "Mercedes Benz SL (R129) 320 Technical Specs, Fuel Consumption, Dimensions".
  26. "1993-1998 Mercedes SL 320 R129 Specs & Performance, Ranks & Comparisons 🚘".
  27. Cars-Directory.NET. "Mercedes-Benz SL (R129) SL 320 (231 Hp) Automatic 1993 - 1995 Specs and Technical Data, Fuel Consumption, Dimensions".
  28. "Mercedes Benz W140 Class S 320 Technical Specs, Fuel Consumption, Dimensions".
  29. "1993 Mercedes-Benz S-class (W140) S 320 (231 Hp) 4 Automatic {{!}} Technical specs, data, fuel consumption, Dimensions".
  30. Cars-Directory.NET. "Mercedes-Benz S-class (W140) S 320 (231 Hp) Automatic 1993 - 1998 Specs and Technical Data, Fuel Consumption, Dimensions".
  31. "1993-1998 Mercedes S 320 W140 Specs & Performance, Ranks & Comparisons 🚘".
  32. "Detailed specs review of 1993 Mercedes-Benz 300 SE offered since mid-year 1992 for North America U.S.".
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