The engine's overall reliability appears moderate to low, based on the provided metrics. A risk score of 7.0 (on a scale of 0 to 10, where higher values indicate greater potential for operational failures or disruptions) suggests a notable likelihood of encountering problems in real-world use, such as unexpected breakdowns or performance inconsistencies that could affect longevity and efficiency. This is underscored by one known issue classified as critical, which points to a high-severity vulnerability capable of causing major system failures if not addressed. In practical terms, this profile implies the engine may require proactive monitoring and maintenance to mitigate risks, though it does not preclude functionality under controlled conditions.
Mercedes-Benz M274
M274 Engine
The M274 is an inline-four petrol engine produced by Mercedes-Benz.
- Manufacturer: Mercedes-Benz
- Fuel Type: Petrol
- Displacement: 2.0 L
- Production Years: 2013–present
Typical Use Cases
- Mercedes C-Class (W205): 2014–present
- Mercedes E-Class (W212/W213): 2013–2019
- Mercedes GLC (X253): 2015–2019
This overview summarizes the reliability of the Mercedes-Benz M274, including common issues and cost drivers.
Technical Specifications
Reliability Analysis
Caution
Not recommended. Risk score of 7.0 indicates high potential for issues, warranting avoidance.
Common Problems & Weak Points
| Issue | Typical Mileage | Repair Cost (Est.) | Severity |
|---|---|---|---|
| Wrist Pin Tolerance Issue | ~60,000 km | €6000 – €10000 | High |
Wrist Pin Tolerance Issue
This is a known issue called the "Wrist Pin Tolerance Issue" that affected early 2015 models of this car. In these vehicles, the wrist pins—small components inside the engine—were installed with the wrong tolerance, which led to scoring on the cylinder walls and eventual engine failure.
The risk is low overall, but it applies specifically to certain VIN batches, so it's worth checking the VIN of the car you're considering. This problem typically shows up around 60,000 km. If it happens, it's critical because it can cause the engine to fail completely, and repairs would cost between 6,000 and 10,000 euros.
Buyer's Inspection Checklist
- Verify the model year: If it's an early 2015, ask the seller for proof of any wrist pin tolerance fix or recall service to avoid cylinder scoring risks.
- Listen for unusual knocking or rattling noises during a test drive, which could indicate wrist pin issues leading to engine failure.
- Check oil condition and level: Look for metal shavings or rapid oil loss, signs of cylinder scoring from faulty wrist pins.
- Request service records: Ensure no history of engine knocking, overheating, or repairs related to wrist pin tolerance problems.
Frequently Asked Questions
Is the M274 engine reliable?
The M274 has known weak points, but with good maintenance the reliability is solid. See the risk analysis and common problems for specifics. Start a report for a specific car.
How expensive are typical repairs?
Common repairs fall into a mid-range cost band depending on the issue and workshop. Check the cost ranges in the table. Use the used car report for specific listings.
Which model years are best for this engine?
Newer production years often include technical updates. Review the production years and revisions in the specs. Use Car Check for quick screening.