Mercedes M256 engine
Content
The 3.0-liter inline 6-cylinder Mercedes M256 engine has been assembled by the company since 2017 and installed on its most powerful and expensive models, such as the S-Class, GLS-Class or AMG GT. There is a version of the engine with one turbine and an additional electric compressor.
The R6 line also includes internal combustion engines: M103 and M104.
Specifications of the Mercedes M256 3.0 liter engine
| Exact volume | 2999 cm³ |
| Supply system | direct injection |
| Internal combustion engine power | 367 hp |
| Torque | 500 Nm |
| Cylinder block | aluminum R6 |
| Block head | aluminum 24v |
| Bore | 83 mm |
| Piston stroke | 92.4 mm |
| Compression ratio | 10.5 |
| Features of the internal combustion engine | ISG 48V |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | Camtronic |
| Turbocharging | BorgWarner B03G |
| What kind of oil to pour | 6.5 liters 5W-30 |
| fuel type | AI-98 |
| Environmental class | EURO 6 |
| Approximate resource | 250 000 km |
| Exact volume | 2999 cm³ |
| Supply system | direct injection |
| Internal combustion engine power | 435 hp |
| Torque | 520 Nm |
| Cylinder block | aluminum R6 |
| Block head | aluminum 24v |
| Bore | 83 mm |
| Piston stroke | 92.4 mm |
| Compression ratio | 10.5 |
| Features of the internal combustion engine | ISG 48V |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | Camtronic |
| Turbocharging | BorgWarner B03G + eZV |
| What kind of oil to pour | 6.5 liters 5W-30 |
| fuel type | AI-98 |
| Environmental class | EURO 6 |
| Approximate resource | 240 000 km |
Fuel consumption of internal combustion engine Mercedes M256
On the example of the 450 Mercedes-Benz GLS 2020 with automatic transmission:
| City | 13.7 liters |
| Track | 8.2 liters |
| Mixed | 10.1 liters |
Similar motors from other manufacturers:
What cars put the M256 3.0 l engine
| AMG GT X290 | 2018 - p.t. |
| CLS-Class C257 | 2018 - p.t. |
| GLE-Class W187 | 2018 - p.t. |
| GLS-Class X167 | 2019 - p.t. |
| E Class W213 | 2018 - p.t. |
| E-Class C238 | 2018 - p.t. |
| S-Class W222 | 2017 – 2020 |
| S-Class W223 | 2020 - p.t. |
Disadvantages, breakdowns and problems of the internal combustion engine M256
This power unit has appeared recently and statistics of its malfunctions have not been collected.
So far, no design flaws have been noted on the specialized forums
On other engines of the modular series, there were failures of Camtronic phase regulators
Like all direct injection engines, this one suffers from carbon deposits on the intake valves.
It is also worth noting the presence of a diesel particulate filter, which is uncharacteristic for gasoline internal combustion engines.
