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Mercedes M264 Engine (2017–Present)
The Mercedes-Benz M264 engine is part of the brand’s modular four-cylinder petrol family, replacing the earlier M270/M274 engines. Launched in 2017, it powers models such as the C-Class (W205/W206), E-Class (W213), and GLC, offering a balance of performance, efficiency, and advanced technology.
With features like twin-scroll turbocharging, direct injection, CAMTRONIC valve timing, and a 48-volt mild-hybrid system (EQ Boost), the M264 represents Mercedes’ next step toward downsized yet powerful petrol engines.
But is it reliable in the long run? This guide covers the M264’s specs, common issues, maintenance tips, and model applications with owner experiences and comparisons to rival engines.
M264 Engine Specifications
| Variant | Displacement | Power | Torque | 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, hybrid setup, OPF filter |
Common features:
- – All-aluminum block with iron liners
- – DOHC with CAMTRONIC VVT
- – Direct fuel injection + twin-scroll turbo
- – Belt-driven 48V starter-generator (eBooster, electric water pump)
- – Oil capacity: 6.1–7.0 L (MB 229.51 spec)
History and Development
- – Introduced in 2017 to replace the M270/M274, bringing more power with lower emissions.
- – First Mercedes four-cylinder petrol with integrated 48-volt mild-hybrid tech.
- – Combines downsizing efficiency with the refinement expected from Mercedes luxury sedans and SUVs.
Related reads: Mercedes M270 Engine | Mercedes M274 Engine
Performance and Driving Experience
- – Horsepower: 181–302 hp
- – Torque: 221–295 lb-ft
- – EQ Boost adds up to 21 hp and 250 Nm instantly during acceleration.
Driving impressions:
- – Smooth and responsive, thanks to hybrid assistance.
- – Reduced turbo lag compared to the M274.
- – More fuel-efficient and quieter than its predecessors.
Key Features and Innovations
- – 48V EQ Boost System: Provides instant torque fill, regenerative braking, and efficient start-stop.
- – Twin-scroll turbocharger: Improves throttle response and reduces lag.
- – CAMTRONIC VVT: Adjusts valve timing for better performance and emissions control.
- – Particulate filter (GPF): Ensures Euro 6 emissions compliance.
M264 Engine Reliability
The M264 is generally reliable, but as a newer direct-injected turbo engine, it comes with specific concerns:
| Issue | Symptoms | Diagnostic & Fix |
|---|---|---|
| Cylinder head / exhaust valve failure | Misfire, sudden power loss (as early as 40k mi) | Compression check; head replacement (often under warranty) |
| Timing chain rattle | Rattle at cold start or idle (~100k km) | Inspect chain/tensioners; replace when noisy |
| Carbon buildup (DI engines) | Rough idle, hesitation, low mpg | Walnut-blast intake valves every 60k mi |
| Oil leaks | Oil smell, stains around gaskets | Replace head gasket/cover seals |
| Hybrid system faults | EQ Boost inactive, fault codes | Dealer software update & eBooster diagnostics |
Related case studies:
Engine Vibrate at Idle in a Mercedes C-Class with M264 Engine
Coolant Leak in a Mercedes C300 with M264 Engine
Mercedes No Power When Accelerate
Knock Sound in Engine Mercedes : Case Study & Solution
My Mercedes Starts And Shuts Off Quickly : Solution Here
Cannot Start Engine See Owner’s Manual: Quick Solution
Engine is Shaking: Best Way to Resolve
Check Engine Light On and AC Not Working? Here’s the Fix
Yellow Brake Warning Light: Causes, Fix & Safety Tips
Coolant Mixing with Engine Oil? Repair Fast
Author
Written by Mercedes Expert
With years of hands-on experience diagnosing and repairing Mercedes-Benz systems, he brings technical depth and practical case studies to help car owners, technicians, and enthusiasts troubleshoot complex automotive issues. His work focuses on clear repair guides, OEM-level procedures, and knowledge-sharing to empower both professionals and drivers.
Last Updated: September 2025
