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History

Mercedes-Benz OM 642 diesel V6 engine

Mercedes Benz
Mercedes-Benz diesel V6 engine
OM 642
Manufacturer: Mercedes Benz
Production period: since 2005
How it works: diesel
Style: Six-cylinder V-engine
Engines: 3.0 liters (2987 cc)
Previous model: OM 648
Successor: OM 656

The built in Berlin the OM 642 -Motor is a diesel engine type with six cylinders in V-arrangement , common-rail direct injection and turbocharger , developed and produced by Daimler for use primarily in the Mercedes-Benz -cars. The engine has a non-standard cylinder bank angle of 72 degrees for V6 engines.

These engines are installed in several performance levels in passenger cars of all series, SUV , vans from Mercedes since March 2005 and stand (as of 2018) in the current production program of Mercedes -Benz.

The abbreviation "OM" stands for "oil engine" (engine, which is operated with light oil / diesel) and designates since the beginning (1920s) until today the diesel engines of the Daimler AG .

History 

In March 2005, the OM 642 was first used in the Mercedes model C 320 CDI of the C-Class 203 series . As of July 2005, the new V-engines were also installed in the E 280 CDI and E 320 CDI in the E-Class 211 series . The engine is a more modern design compared to the previous five- and six-cylinder OM 647 and OM 648 series engines .

The newer strong CDI engines are in the types E 280 CDI (eponymous to the predecessor with the throttled OM 648) and E 320 CDI (eponymous to its predecessor with OM 648) now V6 cylinder. Their advantages are higher torque , higher power , better exhaust emissions and lower production costs . In addition, thanks to the shorter overall length, they now also fit in the C-Class and the ML.

With the appearance of the new OM 651 , the 280 CDI was replaced in the medium term by the new 150 kW four-cylinder engine, which not only has a higher output, but also lower fuel consumption. At the beginning of 2010, however, a performance-throttled 300 CDI was introduced , analogous to the 250 CDI in the E-Class . With 150 kW and 500 Nm, it has the same performance level as the four-cylinder engine ( OM 651 ).

In autumn 2010, the S-Class , the R-Class and the current E-models received an uprated version of the diesel engine called the OM 642 LS. It provides 170 to 195 kW and 540 to 620 Nm. The new 300 CDI now reaches the power level of the previous 350 CDI (without LS), the previous 300 CDI with 150 kW omitted.

Prototypes 

In 2005 there was a test with a turbocharged OM 642 in the showcar SLK 320 CDI Triturbo . There he made 210 kW and 630 Nm. The V6 engines came in the course of their development in areas of the previous V8 diesel OM 629 before. There are within the scope of the EU legislation mandatory for manufacturers CO 2 savings a trend towards " downsizing to be replaced by highly charged, lighter and more fuel-efficient engines with smaller displacements and smaller numbers of cylinders," sucker engines.

The motors are produced in a consistently used modular system. All engines are manufactured at the Berlin-Marienfelde production facility on an assembly line of ThyssenKrupp Krause GmbH. The eight-cylinder CDI OM 629 also builds on the same basis .

Use and performance differentiation of the OM 642 

As with the four-cylinder engines in the C- and E-Class (180 CDI / 200 CDI / 220 CDI / 250 CDI), all model designations (280, 300, 320 and 350) refer to the V6 with an identical displacement of 3.0 liters , Except for the model E 300 CDI here the engine designation does not match the actual displacement. The most powerful version of the engine currently produces 195 kW (265 hp).

The same displacement versions with different capacities Type OM 642 DE 30 LA red. with 140  kW and type OM 642 DE 30 LA with 165 kW / 173 kW differ only by their engine peripherals, by turbocharger , common-rail injection system and the engine controls. There are no component differences in the engine between E 280 CDI and E 320 CDI .

OM 642 DE 30 LA red. 

Designation model series Construction period
Displacement: 2987 cc, Power: 135 kW (184 hp) at 3800 rpm, Torque: 400 Nm at 1600-2600 / min
Sprinter 218 CDI / 318 CDI / 418 CDI / 518 CDI W 906 2006-2009
G 280 CDI 
G 300 CDI
W 461 2007-2013
Displacement: 2987 cc, Power: 140 kW (190 hp) at 4000 rpm, Torque: 440 Nm at 1400-2800 / min
ML 280 CDI 
ML 300 CDI BlueEFFICIENCY
W 164 2005-2009 
2009
E 280 CDI W / S 211 2005-2009
R 280 CDI 
R 300 CDI 
R 300 CDI BlueEFFICIENCY
W / V 251 2007-2009 
2009-2010 
2009-2012
Capacity: 2987 cc, power: 140 kW (190 hp) at 3800 rpm, torque: 440 Nm at 1600-2600 / min
Sprinter 219 CDI / 319 CDI / 419 CDI / 519 CDI 
Sprinter 219 BlueTEC / 319 BlueTEC / 519 BlueTEC 
Sprinter 319 CDI / 419 CDI / 519 CDI
W 906 
W 906 
W 907
2009-2013 
2013-2018 
since 2018
Displacement: 2987 cc, Power: 150 kW (204 hp) at 3800 rpm, Torque: 440 Nm at 1400-2400 rpm
Viano 3.0 CDI / Vito 120 CDI W / V 639 2006-2010
Displacement: 2987 cc, Power: 150 kW (204 hp) at 4000 rpm, Torque: 500 Nm at 1400-2400 rpm
ML 300 CDI BlueEFFICIENCY W 164 2010-2011
E 300 CDI BlueEFFICIENCY W / S 212 2010

OM 642 DE 30 LA 

Designation model series Construction period
Displacement: 2987 cc, Power: 155 kW (211 hp) at 3400 / min, Torque: 540 Nm at 1600-2400 / min
ML 350 BlueTEC W 164 2009-2011
GL 350 BlueTEC X164 2009-2012
E 300 BlueTEC W 211 2007-2009
E 350 BlueTEC W / S 212 2009-2013
R 350 BlueTEC W / V 251 2009-2012
G 350 BlueTEC W 463 2010-2015
Capacity: 2987 cc, power: 160 kW (218 hp) at 4000 rpm, torque: 510 Nm at 1600 rpm
Chrysler 300C Chrysler 300 (2004) 2004-2010
Displacement: 2987 cc, Power: 165 kW (224 hp) at 3800 rpm, Torque: 440 Nm at 1400-2800 / min
Viano 3.0 CDI / Vito 122 CDI W / V 639 2010-2014
Displacement: 2987 cc, Power: 165 kW (224 hp) at 3800 rpm, Torque: 510 Nm at 1600-2800 / min and 540 Nm at 1600-2400 / min
ML 320 CDI 
ML 350 CDI
W 164 2005-2009 
2009
GL 320 CDI 
GL 350 CDI BlueEFFICIENCY
X164 2006-2009 
2009-2010
C 320 CDI W / S 203 2005-2007
C 320 CDI 
C 350 CDI
W / S 204 2007-2009 
2009
GLK 320 CDI 
GLK 350 CDI
X 204 2008-2009 
2009-2010
CLK 320 CDI C / A 209 2005-2010
E 320 CDI W / S 211 2005-2009
CLS 320 CDI 
CLS 350 CDI
C 219 2004-2009 
2009-2010
R 320 CDI 
R 350 CDI
W / V 251 2006-2009 
2009-2010
G 320 CDI 
G 350 CDI
W 463 2006-2009 
2009-2010
Displacement: 2987 cc, Power: 170 kW (231 hp) at 3800 rpm, Torque: 540 Nm at 1600-2400 rpm
ML 350 CDI W 164 2010-2011
C 350 CDI BlueEFFICIENCY 
C 300 CDI 4MATIC 
C 300 CDI 4MATIC BlueEFFICIENCY
W / S 204 2009-2011 
2013-2014 
2011-2013
GLK 350 CDI X 204 2010-2012
E 350 CDI BlueEFFICIENCY C / A 207 2009-2011
E 300 CDI Blue EFFICIENCY 
E 350 CDI BlueEFFICIENCY
W / S 212 2010-2011 
2009-2010
Displacement: 2987 cc, Power: 173 kW (235 hp) at 3600 rpm, Torque: 540 Nm at 1600-2400 rpm
S 320 CDI 
S 320 CDI BlueEFFICIENCY 
S 350 CDI BlueEFFICIENCY
W / V 221 2006-2008 
2008-2009 
2009-2010

OM 642 LS DE 30 LA 

Designation model series Construction period
Displacement: 2987 cc, Power: 170 kW (231 hp) at 3800 rpm, Torque: 540 Nm at 1600-2400 rpm
E 300 CDI BlueEFFICIENCY W / S 212 2011-2013
E 300 BlueTEC W / S 212 2013-2016
Displacement: 2987 cc, Power: 180 kW (245 hp) at 3600 rpm, Torque: 600 Nm at 1600-2400 rpm
G 350 d W 463 2015-2018
Displacement: 2987 cc, Power: 185 kW (252 hp) at 3600 rpm, Torque: 620 Nm at 1600-2400 rpm
E 350 BlueTEC C / A 207 2013-2014
E 350 BlueTEC W / S 212 2013-2014
CLS 350 BlueTEC C 218 2013-2014
CLS 350 BlueTEC 4MATIC C / X 218 2014
Capacity: 2987 cc, power: 190 kW (258 hp) at 3400 rpm, torque: 550 Nm at 1400-3200 rpm
X 350 d 4MATIC Series 470 since 2018
Capacity: 2987 cc, power: 190 kW (258 hp) at 3600 rpm, torque: 620 Nm at 1600-2400 rpm
ML 350 BlueTEC 4MATIC 
GLE 350 d 4MATIC
W 166 since 2011
GL 350 BlueTEC 4MATIC 
GLS 350 d 4MATIC
X166 since 2012
E 350 BlueTEC C / A 207 2014-2017
E 350 d C / A 238 2017-2018
E 350 BlueTEC W / S 212 2014-2016
E 350 d W / S 213 2016-2018
CLS 350 BlueTEC 
CLS 350 d
C / X 218 2014-2018
S 350 BlueTEC W / V 221 2010-2013
S 350 BlueTEC 
S 350 d
W / V 222 2013-2017
GLE 350 d Coupé 4MATIC C 292 since 2015
GLC 350 d 4MATIC 
GLC 350 d 4MATIC Coupe
X 253 
C 253
since 2016
Displacement: 2987 cc, Power: 195 kW (265 hp) at 3800 rpm, Torque: 620 Nm at 1600-2400 rpm
GL 350 CDI BlueEFFICIENCY X164 2010-2012
C 350 CDI 
C 350 CDI BlueEFFICIENCY
W / S 204 2013-2014 
2011-2013
GLK 350 CDI 
GLK 350 CDI BlueEFFICIENCY
X 204 2013-2015 
2012-2013
E 350 CDI BlueEFFICIENCY C / A 207 2011-2013
E 350 CDI BlueEFFICIENCY W / S 212 2010-2013
CLS 350 CDI 
CLS 350 CDI BlueEFFICIENCY
C / X 218 2013-2014 
2011-2013
R 350 CDI W / V 251 2010-2012

In addition, the engine has been used with slight modifications in some Chrysler vehicles, e.g. In the Chrysler 300C 3.0 CRD or in the Jeep Grand Cherokee .

Technical

  • Mercedes OM 642 V6 engine Technical details and specifications (2005-) 

    Mercedes-Benz M-Class (164) 3.0L (2005-2007)

    No. of cylinders 6/DOHC
    Capacity 2987cc
    Compression ratio 18.0:1
    Injection sequence 1-5-3-6-2-4
    Oil temperature 80°C
    Oil pressure 3.0 bar @ 3000rpm
    Radiator cap 1.4bar

    © Motor car History

     

Service

  • Mercedes OM 642 V6 engine Service details (2005-)

    Mercedes-Benz M-Class (164) 3.0L (2005-2007)

    Valve clearance - INLET Hydraulic
    Valve clearance - EXHAUST Hydraulic
    Drive belt size - alternator 2030-2040mm
    Engine oil grade - normal climate 5W/30SAE Synthetic or 5W/40 Synthetic 
    Engine oil grade - cold climate 0W/30SAE Synthetic
    Engine oil grade - hot climate 5W/30SAE Synthetic 
    Engine oil with filter 9.0 litres
    Automatic transmission fluid Type 001 989 4503
    Differential oil grade - front 75W/85 SAE Synthetic 1.1 litres
    Differential oil grade - rear 75W/85 Synthetic 1.1 litres
    Cooling system 10.0litres
    Brake fluid Type DOT 4+ 0.8 litres
    Power steering fluid 1.2 litres

    © Motor car History

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Mercedes X-Class | Mercedes S-Class | Mercedes CLS | Mercedes CLK | Mercedes GLK-Class | Mercedes E-Class | Mercedes Viano | Mercedes Sprinter | Mercedes M ML | Mercedes G-Class | Mercedes C-Class | Chrysler 300 | Mercedes V6 engines | Mercedes diesel engines | V6 engines | Diesel engines

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