M256 EngineM256 Engine
The M256 engine is a high-performance 3.0-liter (2,999 cc) turbocharged inline-six petrol engine designed by Mercedes-Benz. Featuring advanced 48V mild-hybrid technology and an Integrated Starter-Generator (ISG), it delivers smooth, responsive power while supporting improved efficiency and refined driving performance. Depending on the model and configuration, the M256 engine produces approximately 362 hp to 443 hp and 500β520 Nm of torque. Its inline-six layout, turbocharging, and modern hybrid assistance make it a powerful and sophisticated engine choice for a range of premium Mercedes-Benz vehicles. The M256 engine combines strong acceleration, smooth operation, advanced technology, and everyday drivability in one refined powertrain.
In Stock
$4,500.00 – $9,000.00Price range: $4,500.00 through $9,000.00
The prices are exclusive of taxes and shipping. The price may vary depending upon the miles and year of manufacturing.
Additional Information
| Brand | Mercedes-Benz |
|---|---|
| Conditions | Remanufactured, Used |
| Miles | 70000-130000 |
| Year Compatibility | 2017-2025 |
| Verified | Tried & Tested |
| Warranty | Up to 3 Months |
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Specifications
The M256 engine is a 3.0-liter (2,999 cc) turbocharged inline-six petrol engine developed by Mercedes-Benz. Combining strong performance with modern mild-hybrid technology, this engine features a 48V electrical system and an Integrated Starter-Generator (ISG) for smoother acceleration, improved efficiency, and responsive power delivery. Depending on the application and configuration, the M256 engine produces approximately 362 hp to 443 hp, with torque outputs typically ranging from 500 to 520 Nm. Its inline-six configuration provides smooth power delivery, while turbocharging delivers strong performance across the rev range. Designed for premium Mercedes-Benz vehicles, the M256 engine offers an excellent balance of performance, refinement, efficiency, and advanced technology, making it a popular choice for drivers seeking a powerful and sophisticated petrol powertrain.Β
Engine Variants
M256 E25 DEH LA GR
The M256 E25 DEH LA GR is a 2.5-liter (2,498 cc) straight-six petrol variant of the M256 engine family. Designed to deliver a balance of performance, smoothness, and efficiency, it produces approximately 313 hp to 362 hp (230β270 kW) depending on the application and configuration.
M256 E30 DEH LA GR
The M256 E30 DEH LA GR is a high-output 3.0-liter (2,999 cc) inline-six variant featuring advanced forced-induction technology. It combines a turbocharger with an electric auxiliary compressor (eBooster) to provide strong and responsive power delivery, with outputs reaching approximately 429β435 hp.
M256 E30 DEH LA G
The M256 E30 DEH LA G is a 3.0-liter (2,999 cc) version designed for smooth and efficient performance. It uses twin-scroll turbocharging along with Mercedes-Benz EQ Boost 48V mild-hybrid technology, providing responsive acceleration, seamless engine assistance, and refined everyday driving characteristics.
M256 EVO
The M256 EVO represents a newer evolution of the M256 engine family, incorporating updated technology for improved performance and efficiency. It offers broader torque delivery and higher outputs, reaching around 443 hp in certain configurations, while also serving as the basis for more advanced electrified and plug-in hybrid powertrain applications.
Frequently Asked Questions
What type of engine does the Mercedes M256 have?
The Mercedes-Benz M256 is a 3.0-liter turbocharged inline-six gasoline engine paired with a 48-volt mild-hybrid system.
What cars use the M256 engine?
The M256 engine is used in models such as the Mercedes-Benz S-Class, E-Class, CLS, GLE, GLS, and GT 53 AMG.
Is the Mercedes M256 engine reliable?
Yes, the M256 is generally considered a reliable engine when properly maintained and serviced on schedule.
Which Mercedes engine is best?
The M256 is widely regarded as one of Mercedes-Benzβs best modern engines, offering a strong balance of performance, refinement, and efficiency.

