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.
Mercedes V8 family: M113 E43, M113 E50, M113 E55, M119 E42, M119 E50, M119 E60, M156, M157, M176, 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.
Frequently asked questions about the Mercedes M157 DE55
How much power does the Mercedes M157 DE55 make?
The Mercedes M157 DE55 develops 525 - 585 hp and 700 - 900 Nm of torque.
How much oil does the Mercedes M157 DE55 take and which one?
Engine oil capacity: 8.5 liters. Recommended oil: 0W-40.
Does the Mercedes M157 DE55 have a timing belt or chain?
The Mercedes M157 DE55 uses a timing chain.
Is the Mercedes M157 DE55 turbocharged?
Yes, the Mercedes M157 DE55 is turbocharged (two Garrett MGT2260MSL).
Does the Mercedes M157 DE55 need valve clearance adjustment?
No, the Mercedes M157 DE55 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Mercedes M157 DE55 last?
The typical lifespan of the Mercedes M157 DE55 is ~250 000 km with proper maintenance.
What is the fuel consumption of the Mercedes M157 DE55?
Mercedes-Benz GL63 AMG 2014: city 15.8, highway 10.3, combined 12.3 L/100 km.
What cars was the Mercedes M157 DE55 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 and 3 more (see the full list above).
What are the common problems of the Mercedes M157 DE55?
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. All known problems.
