Engine Mercedes M157 DE55

The 5.5-liter bi-turbo Mercedes M157 engine was produced in Germany from 2010 to 2019 and installed on AMG modifications of the CLS-Class, E-Class, ML-Class, GL-Class and S-Class models. There is an atmospheric version of the engine with a cylinder deactivation system and the M152 index.

The V8-family includes: M113 E43, M113 E50, M113 E55, M119 E42, M119 E50, M119 E60, M156, M157, M177, M273, M278.

Specifications

Production years 2010-2019
Displacement, cc 5461
Fuel system direct injection CGI
Power output, hp 525 – 585
Torque output, Nm 700 – 900
Cylinder block aluminum V8
Block head aluminum 32v
Cylinder bore, mm 98
Piston stroke, mm 90.5
Compression ratio 10.0
Features Bi-Turbo
Hydraulic lifters yes
Timing drive chain
Phase regulator on all shafts
Turbocharging two Garrett MGT2260MSL
Recommended engine oil 0W-40
Engine oil capacity, liter 8.5
Fuel type petrol
Euro standards EURO 5
Fuel consumption, L/100 km (for Mercedes-Benz GL63 AMG 2014)
— city
— highway
— combined
15.8
10.3
12.3
Engine lifespan, km ~250 000
Weight, kg 220

The engine was installed on:

  • Mercedes CL-Class C216 in 2010 – 2014; CL-Class C217 in 2014 – 2017;
  • Mercedes CLS-Class W218 in 2011 – 2018;
  • Mercedes E-Class W212 in 2011 – 2016;
  • Mercedes G-Class W463 in 2012 – 2018;
  • Mercedes GL-Class X166 in 2012 – 2019;
  • Mercedes GLE-Class W166 in 2015 – 2018;
  • Mercedes ML-Class W166 in 2012 – 2015;
  • Mercedes S-Class W221 in 2010 – 2013; S-Class W222 in 2013 – 2017;
  • Mercedes SL-Class R231 in 2012 – 2018.

Disadvantages of the M157 DE55 engine

  • This unit is often tuned and its resource depends on the degree of forcing.
  • Like almost all aluminum coated motors, it is prone to scuffing.
  • Also often the catalyst for this problem is the wear of the oil pump gear.
  • A lot of trouble here is caused by a short-lived timing chain and especially tensioners.
  • The weak points of the engine include rather delicate piezoceramic nozzles.

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