The Mercedes-Benz M282 is the 1.33-liter turbocharged four-cylinder gasoline engine that powers most entry-level versions of Mercedes' fourth-generation compact cars. Developed jointly with the Renault-Nissan alliance and introduced in 2018, it features an aluminum block, a DOHC 16-valve head with variable cam timing, centrally mounted direct injection, a single turbocharger and a gasoline particulate filter, and some versions offer cylinder deactivation. It is fitted transversely to the A-Class W177, the B-Class W247, the CLA C118, the GLA H247 and the GLB X247.
For used-car buyers, the M282 is important simply because it is so common. The A 180, A 200, B 200, CLA 200 and GLA 200 are among the best-selling Mercedes models in Europe, and most of them use this engine. It offers good economy and adequate performance, but its small displacement, close relationship with the Renault-Nissan family and pairing with a dual-clutch transmission all shape what ownership looks like.
The variant matters because the same 1,332 cc engine is sold at different outputs, mainly separated by software, and paired with either a 6-speed manual or the 7G-DCT dual-clutch automatic. It also forms the combustion part of the plug-in hybrid 250 e models, which bring their own considerations.
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Base Specifications
| Spec | Detail |
|---|---|
| Type | Inline four-cylinder, turbocharged gasoline, transverse mounting |
| Displacement | 1,332 cc |
| Block | Aluminum |
| Head | Aluminum, 4 valves per cylinder |
| Valvetrain | DOHC, chain-driven, variable intake and exhaust cam timing |
| Injection | Direct injection with centrally mounted injectors |
| Aspiration | Single turbocharger with intercooler |
| Emissions | Gasoline particulate filter |
| Bore x Stroke | 72.2 x 81.4 mm |
| Firing Order | 1-3-4-2 |
| Production Years | 2018–present |
M282 DE14 LA Versions
The M282 replaced the 1.6-liter M270 in the compact range. Both main outputs share the same basic hardware, and both were offered with a 6-speed manual or the 7G-DCT dual-clutch transmission depending on model and market. The engine was not offered in the North American versions of these cars, which used the 2.0-liter M260 instead.
M282 DE14 LA — 136 hp / 148 lb-ft
| Model | Chassis | Years |
|---|---|---|
| A 180 | W177 / V177 (sedan) | 2018–present |
| B 180 | W247 | 2019–present |
| CLA 180 | C118 / X118 | 2019–present |
M282 DE14 LA — 163 hp / 184 lb-ft
| Model | Chassis | Years |
|---|---|---|
| A 200 | W177 / V177 (sedan) | 2018–present |
| B 200 | W247 | 2019–present |
| CLA 200 | C118 / X118 | 2019–present |
| GLB 200 | X247 | 2019–present |
| GLA 200 | H247 | 2020–present |
The M282 also serves as the combustion engine in the plug-in hybrid A 250 e, B 250 e and CLA 250 e, where it works alongside an electric motor integrated into a dedicated version of the 8G-DCT transmission. Outputs and drivetrain details for those models differ from the conventional versions above.
How to Check a Used M282-Powered Car's History
Many M282-powered A-Class, B-Class and CLA models were lease, fleet or rental cars, often used for short urban trips. Check that oil changes were performed on time with the correct low-viscosity specification, that software updates for the engine and 7G-DCT transmission were applied at the dealer, and that there are no recurring entries for misfires, coolant leaks or transmission adaptations. A car that has lived on short trips may also have a heavily loaded gasoline particulate filter and more carbon buildup.
Because these cars are relatively new and numerous, verifying mileage and accident history is especially important. Compare the odometer reading against service, inspection and import records, and confirm whether any remaining factory warranty or extended warranty can be transferred.
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Key Strengths
The M282's main strength is its efficiency. Its small displacement, direct injection and, on some versions, cylinder deactivation deliver low fuel consumption in everyday driving, making the A 180 and A 200 inexpensive to run for a premium car.
It also offers useful low-end torque for its size. The 163 hp version produces 184 lb-ft from low engine speeds, so it feels more flexible in town and on the highway than its displacement suggests, particularly when paired with the 7G-DCT.
Finally, the M282 benefits from shared development and wide parts availability. Because closely related versions of the engine are produced in large numbers by the Renault-Nissan alliance, the core engine design is well understood, and many service components are widely available.
Known Reliability Issues
7G-DCT Low-Speed Behavior
Symptom: Hesitation when pulling away, jerky engagement at walking pace, clunks in stop-and-go traffic or harsh shifts when cold.
Cause: The dual-clutch transmission relies on precise clutch adaptations and software. Behavior can deteriorate if adaptations are not reset after service work, and clutch wear increases with heavy urban use.
Severity: Moderate. Many cases improve with software updates and adaptations, but mechatronic or clutch repairs are expensive.
Typical Mileage: Can appear at any mileage; hardware wear is more likely on high-mileage city cars.
Note: Ask whether the latest transmission software has been installed, and test drive the car in slow traffic before buying.
Coolant Leaks and Thermostat Issues
Symptom: Low coolant warnings, slow warm-up, temperature fluctuations or visible coolant residue.
Cause: Plastic coolant pipes, connectors and thermostat housings can leak or fail with repeated heat cycles in a compact engine bay.
Severity: Moderate. Running low on coolant risks overheating in a high-output small engine.
Typical Mileage: Commonly from around 37,000–75,000 miles (60,000–120,000 km).
Note: Investigate repeated low coolant warnings promptly and only use Mercedes-approved coolant.
Carbon Buildup on Intake Valves
Symptom: Rough idle, hesitation and a gradual loss of performance, particularly on cars used mostly for short trips.
Cause: With direct injection only, oil vapors from the crankcase ventilation system deposit carbon on the intake valves, which are never washed by fuel.
Severity: Low to moderate. Deposits accumulate slowly but affect smoothness and efficiency over time.
Typical Mileage: Usually noticeable beyond around 62,000 miles (100,000 km).
Note: Walnut blasting cleans the valves effectively. Regular longer drives and on-time oil changes slow the buildup.
Ignition Coils, Spark Plugs and Misfires
Symptom: Misfires under load, rough running, a flashing check engine light and misfire codes such as P0300–P0304.
Cause: A small, highly boosted engine places high demands on spark plugs and coils, especially if plug replacement is overdue or low-quality fuel is used.
Severity: Low if addressed promptly; prolonged misfiring can damage the catalytic converter and particulate filter.
Typical Mileage: Any mileage, but most often when plugs are due.
Note: Replace plugs on schedule and use good-quality fuel of the recommended octane rating.
Gasoline Particulate Filter and Short-Trip Use
Symptom: Warning messages related to the exhaust system, reduced performance or increased fuel consumption on cars driven mainly in town.
Cause: The particulate filter needs regular periods of higher exhaust temperature to burn off soot. Repeated short trips prevent this, causing the filter to load up.
Severity: Low to moderate. Most cases are cleared by a longer drive or a dealer-initiated regeneration, but neglected filters may need replacement.
Typical Mileage: Usage-dependent rather than mileage-dependent.
Note: A regular highway drive helps keep the filter healthy. Removing the filter is illegal for road use.
Maintenance Schedule
| Service | Interval |
|---|---|
| Engine oil and filter | Every 6,000–9,500 miles (10,000–15,000 km) or 12 months (shorter than the maximum flexible interval is recommended) |
| Air filter | Every 25,000–37,000 miles (40,000–60,000 km) |
| Spark plugs | Per Mercedes service schedule, typically around 37,000 miles (60,000 km) |
| Cabin filter | Every 12,500 miles (20,000 km) or 12–24 months |
| Brake fluid | Every 2 years |
| Coolant | Check at every service; replace per Mercedes schedule |
| 7G-DCT transmission fluid | Per Mercedes schedule, recommended around every 37,000 miles (60,000 km) |
| Accessory drive belt | Inspect at every service; replace when worn |
| Software updates (engine and transmission) | Check at every dealer visit |
Recommended oil specification: A fully synthetic oil approved to MB 229.71 (0W-20) or MB 229.5, as listed in the vehicle's service booklet for your specific model and market.
Tuning Potential
The M282 is not a performance engine, but software tuning can bring worthwhile gains in midrange torque and responsiveness. Because the 136 hp and 163 hp versions share the same basic hardware, the lower-output version tends to gain the most from a remap. Gains are ultimately limited by the small turbo, fueling and the torque capacity of the 7G-DCT. Figures below are typical estimates and vary by tuner and fuel.
| Stage | Modifications | Estimated Power |
|---|---|---|
| Stage 1 (136 hp version) | ECU remap only | Around 170–185 hp |
| Stage 1 (163 hp version) | ECU remap only | Around 180–195 hp |
| Stage 2 | Remap, intercooler upgrade, intake, transmission calibration | Around 195–205 hp |
Recommended first modifications in priority order:
- Confirm the engine and transmission software are up to date and the car is fault-free
- Fresh spark plugs and coil inspection
- Quality ECU remap from a tuner experienced with the M282
- 7G-DCT calibration to manage the extra torque smoothly
- Intercooler upgrade if the car is driven hard in warm climates
The 7G-DCT has a finite torque capacity, so conservative torque increases are kinder to the clutches than peak-power tunes. Use high-quality fuel of at least the recommended octane, keep oil changes frequent and monitor coolant levels. Removing the gasoline particulate filter or catalytic converter is illegal for road use in the EU and the UK. Tuning a car under warranty may also affect coverage.
FAQ
Is the Mercedes M282 a reliable engine?
Generally, yes. The M282 has proven reasonably dependable in everyday use, and most reported issues relate to the dual-clutch transmission, cooling components, ignition parts and the effects of short-trip driving rather than major internal failures.
What are the most common M282 problems?
The most frequently reported issues are 7G-DCT low-speed behavior, coolant leaks or thermostat faults, carbon buildup on the intake valves, ignition-related misfires and particulate filter loading on short-trip cars.
How long does an M282 engine last?
With regular maintenance, the M282 should be capable of reaching 124,000 miles (200,000 km) or more. On-time oil changes with the correct specification and regular longer drives are key to longevity.
How does the M282 compare to the M270?
The M282 replaced the 1.6-liter M270 in the compact range. It is smaller, more efficient and cleaner thanks to its particulate filter, and it delivers similar or better real-world performance. The M270 is a simpler, more established design, while the M282 offers better economy and more modern technology.
What is the tuning ceiling of the M282?
Around 190–205 hp is a realistic ceiling with software and mild supporting modifications. Beyond that, the small turbo and the transmission's torque capacity limit further gains.
Is a tuned M282 still daily-drivable?
Yes. A mild Stage 1 tune keeps the car smooth and efficient while improving overtaking response. Pair the tune with transmission calibration and keep up with maintenance.
Conclusion
The Mercedes-Benz M282 is an efficient, practical engine that suits the everyday role of the A-Class, B-Class, CLA, GLA and GLB well. It is not a performance unit, but it is economical, adequately punchy and generally dependable. Focus your inspection on the 7G-DCT behavior, cooling system, ignition components and service history, and an M282-powered Mercedes can be a sensible and affordable premium choice.
Overall Reliability Score: 7/10
Tuning Score: 5/10
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