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.
2nd gen Mercedes R4 family: M133, M139, M200, M252, M254, M260, M264, M270, 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 |
10.4 7.0 8.3 |
| 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.
Frequently asked questions about the Mercedes M139
How much power does the Mercedes M139 make?
The Mercedes M139 develops 365 - 476 hp and 420 - 545 Nm of torque.
How much oil does the Mercedes M139 take and which one?
Engine oil capacity: 5.5 liters. Recommended oil: 0W-40.
Does the Mercedes M139 have a timing belt or chain?
The Mercedes M139 uses a timing chain.
Is the Mercedes M139 turbocharged?
Yes, the Mercedes M139 is turbocharged (BorgWarner B03G).
Does the Mercedes M139 need valve clearance adjustment?
No, the Mercedes M139 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Mercedes M139 last?
The typical lifespan of the Mercedes M139 is ~250 000 km with proper maintenance.
What is the fuel consumption of the Mercedes M139?
Mercedes CLA 45 AMG 2021: city 10.4, highway 7.0, combined 8.3 L/100 km.
What cars was the Mercedes M139 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 and 1 more (see the full list above).
What are the common problems of the Mercedes M139?
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. All known problems.
