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.
