Engine Mercedes M139

The 2.0-liter turbo engine of the Mercedes AMG M139 has been assembled at a German plant since 2019 and is installed on AMG versions of models with a transverse or longitudinal arrangement of the unit. There are hybrid modifications with electric motors of 14 hp / 150 Nm and 204 hp / 320 Nm.

R4 Mercedes engines: M102, M111, M133, M139, M166, M200, M254, M260, M264, M266, M270, M271, M274, M282.

Specifications M 139 DE 20 AL

Production years since 2019
Displacement, cc 1991
Fuel system combined injection
Power output, hp 365 – 476
Torque output, Nm 420 – 545
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 83
Piston stroke, mm 92
Compression ratio 9.0
Features DOHC
Hydraulic lifters yes
Timing drive chain
Phase regulator on all shafts
Turbocharging BorgWarner B03G
Recommended engine oil 0W-40
Engine oil capacity, liter 5.5
Fuel type petrol
Euro standards EURO 6
Fuel consumption, L/100 km (for Mercedes CLA 45 AMG 2021)
— city
— highway
— combined
Engine lifespan, km ~250 000
Weight, kg 160.5

The engine was installed on:

  • Lotus Emira 1 (Type 131) since 2022;
  • Mercedes A-Class W177 since 2019;
  • Mercedes C-Class W206 since 2022;
  • Mercedes CLA-Class C118 since 2019;
  • Mercedes GLA-Class H247 since 2020;
  • Mercedes GLC-Class X254 since 2023;
  • Mercedes SL-Class R232 since 2022.

Disadvantages of the Mercedes M139 engine

  • This is a completely reliable turbo engine for this level of boost and there are no problems with it;
  • Even the newfangled Nanoslide coating lasts a long time and there have been no cases of shedding yet;
  • It is worth noting that such units are demanding in terms of fuel quality and maintenance;
  • On specialized forums there are a couple of complaints about a flown turbine pipe and antifreeze leaks;
  • The owners also noticed the presence of a belt drive for the oil pump.

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