Wikipedia

Mercedes-Benz M112 engine

TheMercedes-BenzM112engine is agasoline-fueled,4-stroke,spark-ignition,internal-combustionautomobilepistonV6 enginefamily used in the 2000s. Introduced in 1996, it was the first gasoline V6 engine ever built by Mercedes. A short time later the relatedM113V8was introduced.

Mercedes-Benz M112 engine
Overview
ManufacturerMercedes-Benz
Production1996–2015
Layout
Configuration90°V6
Displacement2.4 L (2,398 cc)
2.6 L (2,597 cc)
2.8 L (2,799 cc)
3.2 L (3,199 cc)
3.7 L (3,724 cc)
Cylinder bore83.2 mm (3.28 in)
89.9 mm (3.54 in)
97 mm (3.82 in)
Piston stroke68.2 mm (2.69 in)
73.5 mm (2.89 in)
84 mm (3.31 in)
Cylinder blockmaterialAluminum
Cylinder headmaterialAluminum
ValvetrainSOHC3 valves x cyl.
RPM range
Max. engine speed6,000-6,400 rpm
Combustion
SuperchargerIHITwin-screw type(in some versions)
FuelsystemSequential fuel injection
Fuel typeGasoline
Cooling systemWater cooled
Output
Power output125–260 kW (170–354 PS; 168–349 bhp)
Torque output225–450 N⋅m (166–332 lb⋅ft)
Chronology
PredecessorMercedes-Benz M104(inline-6)
SuccessorMercedes-Benz M272

All are built inBad Cannstatt,Germany, except thesuperchargedC 32AMGandSLK 32 AMG,assembled inAffalterbach,Germany.

All M112 engines have silicon/aluminum (Alusil) engine blocks with a 90° vee angle. The aluminumSOHCcylinder heads have3 valves per cylinder.All usesequential fuel injectionwith twospark plugsper cylinder. All have forged steelconnecting rods,a one-piece castcamshaft,iron-coated aluminum pistons and a magnesiumintake manifold.To deal with the vibration problems of a 90 degree V6, a balancer shaft was installed in the engine block between thecylinder banks.This essentially eliminated first and second order vibration problems (seeengine balance). A dual-lengthVariable Length Intake Manifoldis fitted to optimise engine flexibility.

E24

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TheE24is a 2.4 L (2,398 cc) version. Bore and stroke is 83.2 mm × 73.5 mm (3.28 in × 2.89 in). The engine produces 168 bhp (125 kW; 170 PS) at 5900 rpm and 225 N⋅m (166 lb⋅ft) of torque between 3000 and 5500 rpm. The compression ratio is 10.0:1.[1][2]

Applications:

E26

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TheE26is a 2.6 L (2,597 cc) version. Bore and stroke is 89.9 mm × 68.2 mm (3.54 in × 2.69 in). Output is 125 kW (170 PS; 168 bhp) ECE at 5,500 rpm 240 N⋅m (177 lb⋅ft) of torque at 4,500 rpm in all applications except in the 2003-2005 W211 E-Class where power rose to 130 kW (177 PS; 174 bhp).[3][4][5]The compression ratio is raised to 10.5:1.[1][6]

Applications:

M112.912:

M112.914:

M112.916:

M112.917:

M112.950:

E28

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TheE28is a 2.8 L (2,799 cc) version. Bore and stroke is 89.9 mm × 73.5 mm (3.54 in × 2.89 in). It produces 201 bhp (150 kW; 204 PS) (W220 S280,R129 SL280andW210 E280) or 194 bhp (145 kW; 197 PS) (W202 C280) at 5,700 rpm and 270 N⋅m (199 lb⋅ft) of torque between 3,000 and 5,000 rpm. The compression ratio is 10.0:1.[1][7]

Applications:

E32

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Chrysler Crossfire view of engine compartment

TheE32is a 3.2 L (3,199 cc) version. Bore remains at 89.9 mm (3.54 in) but the engine is stroked to 84 mm (3.31 in). Output is 215-224 bhp ECE at 5,700 rpm (depending on model) with 315 N⋅m (232 lb⋅ft) of torque at 3,000-4,800 rpm. The compression ratio is 10.0:1. It has fracture-split forged steel connecting rods.[1][8]

Applications:

E32 ML

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Supercharged C 32 AMG/SLK 32 AMG engine

TheE32 Kompressoris a special version of the 3.2 L (3,199 cc), fitted with a helicalTwin-screw type supercharger.The supercharger was developed in conjunction withIHIand featuresTeflon-coated rotors producing overall boost of 14.5 psi (1.00 bar) with the factory 74mm clutch-activated pulley. A water-to-airintercoolermade byGarrettis fitted beneath the supercharger inside the V, with a 0.8LHeat-Exchangermounted under the bumper run by an electric water pump. Output is 260 kW (354 PS; 349 bhp) ECE at 6,100 rpm with 450 N⋅m (332 lb⋅ft) of torque at 3,000-4,600 rpm. The compression ratio is 9.0:1.[1][9]

Applications:

E37

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TheE37is a 3.7 L (3,724 cc) version. It retains the stroke of the E32 but is bored to 97 mm (3.82 in). Output is 173 to 180 kW (235 to 245 PS; 232 to 241 bhp) ECE at 5,750 rpm with 344 N⋅m (254 lb⋅ft) of torque at 3,000-4,500 rpm. The compression ratio is 10.0:1.[1][10]

Applications:

See also

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References

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  1. ^abcdef"Mercedes-Benz M112 V6 petrol engine".motor-car.net.Archived fromthe originalon 29 September 2020.Retrieved8 January2020.
  2. ^"C 240 / W 202 E 24, 1997 - 2000".mercedes-benz-publicarchive.Retrieved28 November2023.
  3. ^"Detailed specs review of 2004 Mercedes-Benz E 240 model for Europe".automobile-catalog.Retrieved2023-02-18.
  4. ^"2002-2005 Mercedes E 240 W211 Specs & Performance, Ranks & Comparisons 🚘".encyCARpedia.Retrieved2023-02-18.
  5. ^"Mercedes Benz E Class (W211) 240 4Matic Technical Specs, Fuel Consumption, Dimensions".ultimatespecs.Retrieved2023-02-18.
  6. ^"C 240 / W 203 E 26, 2000 - 2004".mercedes-benz-publicarchive.Retrieved28 November2023.
  7. ^"C 280 (V6 engine) / W 202 E 28, 1997 - 2000".mercedes-benz-publicarchive.Retrieved28 November2023.
  8. ^"CLK 320 / C 208 E 32, 1997 - 1999".mercedes-benz-publicarchive.Retrieved28 November2023.
  9. ^"SLK 32 AMG / R 170 E 32 ML, 2001 - 2004".mercedes-benz-publicarchive.Retrieved28 November2023.
  10. ^"ML 350 / W 163 E 37, 2002 - 2004".mercedes-benz-publicarchive.Retrieved28 November2023.
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