If you’re a Mercedes-Benz owner or enthusiast, chances are you’ve come across the M274 engine a turbocharged four cylinder powerhouse that promises a blend of performance, fuel efficiency, and modern engineering. But is it all smooth driving under the hood? Or does the M274 Engine hide a few surprises you’ll want to know before it’s too late?
Whether you’re considering buying a Mercedes equipped with the M274 or already have one parked in your garage, this article is your ultimate guide. We’ll break down everything from specs and standout features to the most common issues reported by real drivers and how to avoid costly repairs.
Packed with real-world insights, expert tips, and no fluff, this guide will help you understand the M274 engine like never before. So grab a coffee, get comfortable, and let’s dive into what makes the Mercedes M274 engine tick and what you need to watch out for in 2025 and beyond.
Mercedes M274 Engine : Overview
The Mercedes M274 engine represents a significant evolution in automotive engineering, bringing together advanced technology and high performance. Introduced as part of Mercedes-Benz’s strategy to enhance efficiency and power, the M274 engine has become a cornerstone of the brand’s lineup.
M274 Engine Problems and Solutions
If you’ve been searching about the Mercedes M274 engine, you’re probably wondering one thing: how reliable is it really? While this turbocharged four-cylinder powerplant delivers impressive performance and fuel economy, it’s not without its flaws.
Over the years, owners have reported a handful of recurring issues some minor, others potentially engine-threatening. If you’re looking for a deep dive into these concerns, check out our full breakdown of M274 engine problems here
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Engine Overheating But Coolant Full: 100% Easy
Overall Verdict:
The M274 engine is a well-regarded, modern powerplant that offers a good mix of performance, efficiency, and reliability. However, like any engine, it requires regular maintenance and care to avoid common issues. If well-maintained, the M274 can be a durable and reliable engine choice for many Mercedes-Benz models.
M274 Engine Specifications
| Production years | since 2011 |
| Displacement, cc | 1595 (M274 DE 16 AL) 1991 (M274 DE 20 AL) |
| Fuel system | direct injection |
| Power output, hp | 129 – 156 (M 274 DE 16 AL) 156 – 245 (M 274 DE 20 AL) 279 – 333 together with electric motor |
| Torque output, Nm | 210 – 250 (M 274 DE 16 AL) 270 – 370 (M 274 DE 20 AL) 600 – 700 together with electric motor |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 73.7 (M 274 DE 16 AL) 92 (M 274 DE 20 AL) |
| Compression ratio | 10.3 (M 274 DE 16 AL) 9.8 (M 274 DE 20 AL) |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | yes |
| Recommended engine oil | 5W-30, 5W-40 |
| Engine oil capacity, liter | 6.0 – 7.0 |
| Fuel type | petrol |
| Euro standards | EURO 5/6 |
| Fuel consumption, L/100 km (for Mercedes C 250 2017) — city — highway — combined | 7.9 5.2 6.2 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 137 |
Which Mercedes has a M274 engine?
The Mercedes-Benz M274 engine is found in several models across the brand’s lineup, typically in vehicles produced from around 2012 onwards. Here are some of the key models equipped with the M274 engine:
C-Class (W205 and W204 Facelift)
- C180 (1.6L variant of the M274)
- C200 (2.0L variant of the M274)
- C250 (2.0L variant of the M274)
E-Class (W212 Facelift and W213)
- E200 (2.0L variant of the M274)
- E250 (2.0L variant of the M274)
GLC-Class (X253)
- GLC 200 (2.0L variant of the M274)
- GLC 250 (2.0L variant of the M274)
SLC-Class (R172)
- SLC 200 (2.0L variant of the M274)
- SLC 300 (2.0L variant of the M274)
SLK-Class (R172)
- SLK 200 (2.0L variant of the M274)
- SLK 250 (2.0L variant of the M274)
E-Class Coupe (C207 and C238)
- E200 (2.0L variant of the M274)
- E250 (2.0L variant of the M274)
GLK-Class (X204 Facelift)
- GLK 250 (2.0L variant of the M274)
These models feature different versions of the M274 engine, with varying displacements and power outputs depending on the specific model and market. The engine is known for its balance of performance and efficiency, making it a popular choice in many of Mercedes’ compact and mid-size vehicles.
Specifications and Technical Details
The M274 engine is renowned for its impressive specifications and technical prowess. This 2.0-liter turbocharged inline-4 engine boasts a power output ranging from 154 to 208 horsepower, depending on the variant.
Key features include direct fuel injection, an aluminum block and cylinder head, and a twin-scroll turbocharger, all of which contribute to its remarkable performance and efficiency. When compared to other Mercedes engines, the M274 Engine stands out due to its blend of power, efficiency, and cutting-edge technology.
Performance and Efficiency
Performance-wise, the M274 engine delivers an exhilarating driving experience. It offers robust acceleration and high horsepower, making it suitable for a variety of driving conditions. The engine’s turbocharging technology ensures quick response and sustained power delivery.
Furthermore, the M274 Engine excels in fuel efficiency, achieving impressive mileage while maintaining low emissions. The combination of performance and efficiency makes the M274 a favorite among enthusiasts and eco-conscious drivers alike.
Is the M274 a good engine?
The Mercedes-Benz M274 engine is generally regarded as a good engine, especially for its balance of performance and efficiency. Here are some key points to consider:
Strengths:
- Performance: The M274 engine is turbocharged, which provides strong performance, particularly in models like the C-Class, E-Class, and GLC. It offers a good balance of power and fuel efficiency.
- Fuel Efficiency: The direct injection and turbocharging technology in the Mercedes m274 contribute to improved fuel efficiency compared to older naturally aspirated engines.
- Reliability: The M274 is considered more reliable than its predecessor, the M271, especially when maintained properly. Mercedes has addressed some of the timing chain and oil consumption issues that were prevalent in older engines.
- Modern Technology: The engine incorporates advanced technology, such as an aluminum block, integrated exhaust manifold, and piezo injectors, making it a modern and efficient powerplant.
What is the difference between M270 and M274?
The Mercedes-Benz M270 and M274 engines are both part of the same engine family, sharing many similarities, but they differ mainly in their applications and configurations.
Key Differences:
- Application:
- M270: This engine is designed for transverse (front-wheel-drive) applications and is primarily found in models like the A-Class W176, B-Class, CLA 117, and GLA X156. It powers compact vehicles where space efficiency is crucial.
- M274: This engine is used in longitudinal (rear-wheel-drive) configurations, typically found in models like the C-Class, E-Class, GLC, and SLC. It’s designed for vehicles with rear-wheel or all-wheel drive, offering a different layout and driving dynamics.
- Mounting Orientation:
- M270: Transversely mounted, meaning the engine is installed sideways in the engine bay.
- M274: Longitudinally mounted, with the engine positioned front-to-back.
- Performance and Tuning:
- While both engines are available in similar displacements and turbocharged configurations, the M274 generally offers slightly higher performance outputs in certain models due to its application in more performance-oriented vehicles.
The M270 and M274 engines are technically similar but are adapted for different vehicle architectures, with the M270 for transverse FWD setups and the Mercedes m274 for longitudinal RWD setups.
Maintenance and Care Tips
Proper maintenance is crucial to ensuring the longevity and optimal performance of the M274 engine. Adhering to a regular maintenance schedule, which includes timely oil changes, filter replacements, and inspections, is vital.
Using the recommended oil types and intervals helps maintain the engine’s health. Additionally, keeping the cooling system in top condition is important to prevent overheating. Simple tips such as regular checks of the coolant level and condition can go a long way in extending the engine’s life.
More information about the maintenance and services of Mercedes M274 Engine in the following link;
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M274 engine oil capacity
The Mercedes M274 engine typically requires about 6.0 to 6.5 liters (approximately 6.3 to 6.9 quarts) of engine oil for a complete oil change, including the oil filter. The exact amount can vary slightly depending on the specific model and whether the oil filter is replaced during the service.
It’s important to use the correct oil specification recommended by Mercedes-Benz, typically a full synthetic oil that meets the Mercedes-Benz MB 229.5 or MB 229.3 specification. Always refer to the vehicle’s owner manual or consult with a Mercedes-Benz service center for the exact oil capacity and specifications for your specific model and year.
Comparison with Other Engines
When compared to its predecessor, the M271, the Mercedes m274 Engine offers significant advancements in both performance and efficiency. The M274’s use of direct fuel injection and turbocharging technology sets it apart.
Additionally, it competes favorably against engines from other manufacturers, offering a balanced mix of power and fuel economy. Looking ahead, the M274 is likely to influence the development of future Mercedes engines, continuing the brand’s legacy of innovation.
Conclusion
In summary, the Mercedes M274 engine is a remarkable feat of engineering, combining high performance with efficiency and reliability. While it does have its common issues, regular maintenance and care can mitigate these problems.
Whether you are an enthusiast looking to upgrade your vehicle or a prospective buyer seeking a reliable engine, the M274 offers a compelling package. Share your experiences and insights with this engine to help others make informed decisions.
