Mercedes-Benz M104 engine

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 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 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): (without catalytic converter). Version R129 300SL-24 has version of 3-liter M104 engine. • Torque at 4600 rpm: or (without catalytic converter) • Bore and stroke: • 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 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 . ;Specifications for 2.8 L • Engine power at 5500 rpm: or 145–148 kW (197 PS; 195 hp/201PS; 199 hp) on SsangYong models • Torque at 3750 rpm: or 271–277 N·m (199–204 lb·ft) on SsangYong models • Bore and stroke: • Lubrication system: pressure circulation • Oil capacity: • Coolant capacity: • 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 , 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 . ;Specifications • Engine power at 5500 rpm: or • Torque at 3750 rpm: or • Bore and stroke: • Compression ratio: 9.2:1 to 10.0:1 • Intake valves: • Exhaust valves • 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: at 6500 rpm • Torque: at 4500 rpm • Bore and stroke: • Lubrication system: pressure circulation • Oil capacity: • Coolant capacity: • 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 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 at 5,750 rpm and of torque at 4,000 rpm using the HFM engine management system. Bore and stroke is with a compression ratio of 10.5. AMG later conceded that since the engine was hand modified, power outputs could vary slightly from . The boost in displacement was obtained by boring the 2.8 litre M104 block by and using a highly modified version of the crankshaft from the 3.5L OM603 to increase throw by ; 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 or 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 , 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 ==