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Mercedes M264 Engine (2017–Present): Guide, Known Issues & Maintenance
Introduced in 2017, the M264 is the longitudinal 1.5 L/2.0 L twin-scroll turbocharged inline‑4 in Mercedes’ modular petrol engine family, featuring direct injection, CAMTRONIC VVT, particulate filter, 48 V mild hybrid components, and a belt-driven starter-generator
M264 Engine reliability
Mercedes M264 is used in several newer Mercedes-Benz models, including the C-Class (W205/W206), E-Class (W213), and Mercedes GLC. Beyond its performance credentials, the engine is also known for its compact design and smooth integration with mild-hybrid systems in certain trims.
In this article, we will explore the full scope of the M264’s capabilities covering its technical specifications, real-world performance, common reliability concerns, and maintenance tips that help keep it running at its best.
M264 Engine Specifications
| Variant | Displacement | Power | Torque | Extra Features |
|---|---|---|---|---|
| M264 E15 DEH LA | 1,497 cc | 116–135 kW (158–184 hp) | 250–280 Nm | 48 V starter-generator, twin-scroll turbo, piezo injection |
| M264 E20 DEH LA | 1,991 cc | 145–220 kW (197–299 hp) | 320–400 Nm | Larger turbo; same hybrid setup |
Common Features:
- – Aluminium block with iron liners & DOHC VVT
- – Twin-scroll turbo, direct injection, OPF
- – 48 V belt-driven hybrid system (e‑Booster & water pump)
- – Oil capacity ~6.1–7.0 L synthetic, service ~9,000 miles annually
History and Development
Background and Evolution
The M264 engine was introduced as a successor to the M270 and M274 engines. It represents the next step in Mercedes-Benz’s journey towards more efficient and powerful engines. The development of the M264 focused on integrating advanced technologies to enhance performance while reducing fuel consumption and emissions.
Comparison with Previous Models
Compared to its predecessors, the M264 engine features significant improvements in both design and functionality. The engine incorporates a twin-scroll turbocharger and a 48-volt mild hybrid system, which were not present in the M270 and M274 models.
These advancements contribute to better acceleration, smoother power delivery, and improved overall efficiency.
Technical Specifications
Engine Configuration and Design
The M264 is a 2.0-liter inline-four engine that comes with a twin-scroll turbocharger. It has a displacement of 1991 cc and is equipped with direct fuel injection, variable valve timing, and a belt-driven starter-generator. The engine’s compact design allows it to fit into various Mercedes-Benz models, from compact cars to larger sedans.
Performance Metrics
What are the power output ranges for the M264 engine?
The M264 engine boasts impressive performance metrics. Depending on the model, it can produce between 181 to 302 horsepower and 221 to 295 lb-ft of torque. This power output ensures that vehicles equipped with the M264 offer a dynamic driving experience with swift acceleration and robust power delivery.
Key Features and Innovations
Advanced Technology and Engineering
One of the standout features of the M264 engine is its 48-volt mild hybrid system. This system includes a belt-driven starter-generator that assists the engine during acceleration, reducing turbo lag and improving fuel efficiency.
Additionally, the engine features a twin-scroll turbocharger that optimizes exhaust gas flow, enhancing performance and reducing emissions.
Fuel Efficiency and Emissions
The M264 engine is designed with efficiency in mind. The integration of the mild hybrid system and advanced turbocharging technology helps achieve lower fuel consumption and reduced CO2 emissions.
This makes the M264 not only powerful but also environmentally friendly, aligning with global trends towards more sustainable automotive technologies.
M264 engine problems & Recommended Fixes
What are some common issues with the M264 engine?
While the M264 engine is known for its reliability, some owners have reported issues such as turbocharger failures, oil leaks, and timing chain problems. Regular maintenance and timely addressing of these issues can help mitigate their impact.
Mercedes-Benz has also provided service bulletins and recalls to address M264 engine problems, ensuring that owners can maintain their vehicles in top condition.
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| Issue | Symptoms | Diagnostic & Fix |
|---|---|---|
| Cylinder head/exhaust valve failure | Misfire, sudden power loss (as early as 40k mi) | Compression/loss; replace cracked head; reported under warranty |
| Timing chain rattle | Rattle at cold start or low rpm (~100k km) | Inspect chain/tensioners; replace when noisy |
| Carbon buildup | Rough idle, hesitation, low mpg | Walnut blasting every ~60k miles |
| Head gaskets/oil leaks | Oil stains, burning smell | Replace gaskets proactively |
| Hybrid system faults | Fault codes, eBooster inactive | Software update; dealer inspection |
| Compression loss | Misfires, low power | Perform leak-down tests; check bore status |
Recommended Maintenance (60k mi intervals)
- – Walnut-blast intake valves to remove carbon
- – Inspect timing chain/tensioners
- – Check for oil leaks at gaskets and seals
- – Compression test if misfire or low performance
- – Hybrid system update: e-Booster & water pump diagnostics
- – Head inspection if compression loss appears early
User Reviews and Experiences
Owner Feedback and Testimonials
Owners of vehicles equipped with the M264 engine generally praise its performance and efficiency. Many appreciate the smooth power delivery and the seamless integration of the mild hybrid system.
However, some have noted the aforementioned issues, emphasizing the importance of regular maintenance. Overall, the feedback highlights the engine’s blend of power and practicality.
Aftermarket and Upgrades
Performance Upgrades and Modifications
For enthusiasts looking to enhance the performance of their M264 engine, there are several aftermarket options available. These include upgraded turbochargers, performance exhaust systems, and ECU tuning.
These modifications can significantly boost horsepower and torque, providing an even more exhilarating driving experience.
Aftermarket Parts and Accessories
In addition to performance upgrades, there are various aftermarket parts and accessories available for the M264 engine. These include high-flow air filters, upgraded intercoolers, and enhanced cooling systems.
These parts not only improve performance but also contribute to the engine’s longevity and reliability.
Conclusion
Summary of Key Points
The Mercedes M264 engine is a remarkable piece of engineering that combines power, efficiency, and advanced technology. Its development represents a significant step forward for Mercedes-Benz, offering a blend of performance and environmental consciousness.
Final Thoughts and Recommendations
For those considering a vehicle with the M264 engine, it offers a compelling choice. Regular maintenance and awareness of common issues can ensure a long and trouble-free ownership experience. With its impressive specifications and innovative features, the M264 continues to uphold Mercedes-Benz’s reputation for excellence.
Comparisons with Competitors
When compared to engines like the BMW B48 and Audi EA888, the M264 holds its own with its blend of power, efficiency, and advanced technology. Each of these engines has its strengths, but the M264’s mild hybrid system gives it a unique edge in fuel efficiency and emissions reduction.
Future of the M264 Engine
The future of the M264 engine looks promising, with potential for further enhancements in efficiency and performance. Mercedes-Benz’s ongoing commitment to innovation suggests that future iterations of this engine will continue to push the boundaries of automotive engineering.
Frequently Asked Questions
Is the M264 reliable?
Generally yes, with smooth performance and efficiency but be aware of early head failures and chain wear.
What triggers carbon buildup?
Direct injection leads to deposits clean valves every ~60k miles to prevent misfires.
When does the head issue appear?
Around 40k–50k miles in rare cases, usually with exhaust valve cracks requiring head replacement.
Do I need hybrid system maintenance?
Yes, 48 V components like the starter-generator and water pump may require software updates or diagnostics.
