The Mercedes — Benz M274.930 is a 1,991 cc, inline — four petrol engine produced between 2011 and 2017. It features direct fuel injection (BlueDIRECT), turbocharging, and variable valve timing (CAMTRONIC), delivering 155 kW (211 PS) and 350 Nm of torque. This engine was engineered for transverse installation in compact and mid — size platforms, offering a balance of responsive performance and improved fuel efficiency over naturally aspirated predecessors.
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All M274.930 engines comply with Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Mercedes-Benz M274.930 is a 1,991 cc inline-four turbocharged petrol engine developed for transverse applications in compact and executive segments (2011–2017). It combines turbocharging, direct injection (BlueDIRECT), and CAMTRONIC variable valve lift to deliver strong torque and improved efficiency. Designed to meet Euro 5 standards, it replaced naturally aspirated M271 variants in key model lines.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,991 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve with CAMTRONIC | |
Aspiration | Turbocharged (BorgWarner) with air-to-air intercooler | |
Bore × stroke | 83.0 mm × 92.0 mm | |
Power output | 155 kW (211 PS) @ 5,500 rpm | |
Torque | 350 Nm @ 1,200–4,000 rpm | |
Fuel system | Direct injection (BlueDIRECT), multi-hole injectors | |
Emissions standard | Euro 5 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | BorgWarner KP39 variable turbine geometry (VTG) | |
Supercharger | N/A | |
Timing system | Chain-driven (double-row, tensioner-regulated) | |
Oil type | MB 229.51 (SAE 5W-40) | |
Dry weight | 152 kg |
The Mercedes-Benz M274.930 was used across Mercedes-Benz's W176/W204 platforms with transverse mounting and adapted for front-wheel-drive applications. This engine received platform-specific calibrations-shorter intake runners in the A-Class and revised engine mounts in the C-Class-and from 2014 the facelifted W204 received updated high-pressure fuel pumps, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M274.930's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in high-mileage units. Internal Mercedes quality reports from 2015 noted a significant share of pre-2014 engines requiring HPFP replacement before 150,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to lambda sensor degradation in city-driven vehicles. Extended idling and poor fuel quality increase carbon loading on injectors and VTG components, making oil and fuel maintenance critical.
Analysis derived from Mercedes-Benz technical bulletins (2011-2017) and UK DVSA failure statistics (2014-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M274.930 delivers strong performance and good efficiency when properly maintained. Early models (2011–2013) had higher incidence of HPFP wear, but post-2014 revisions improved durability. Regular oil changes (15,000 km) using MB 229.51 (5W-40) and high-quality fuel (95 RON min) are critical. Well-serviced engines regularly exceed 200,000 km without major issues.
The most documented issues are high-pressure fuel pump failure, intake carbon buildup, coolant leaks from electric water pump, and valve cover oil seepage. These are confirmed in Mercedes-Benz service bulletins and field reports. HPFP and water pump failures are more common in pre-2014 models, while carbon buildup affects all variants over time.
This 2.0L turbocharged petrol engine was used in the A-Class (W176), B-Class (W246), and C-Class (W204) from 2011–2017. It powered the A 250, B 250, and C 250 trims. Renault also used a licensed version in select Latitude models (2012–2016). Applications comply with Euro 5 emissions standards.
Yes. ECU remaps can yield +30–50 kW on stage 1, leveraging the robust BorgWarner VTG turbo. Intercooler upgrades help reduce heat soak. Over-tuning risks premature HPFP or turbo failure. Supporting modifications (upgraded intercooler, exhaust) are recommended for sustained performance use. Factory torque ceiling limits safe gains.
Moderate. In a C 250 (W204), combined consumption is ~7.8 L/100km (36 mpg UK). City driving may see 9–10 L/100km (31–28 mpg), while highway runs can achieve ~6.5 L/100km (43 mpg). Real-world figures depend on driving style, but expect 30–38 mpg (UK) under mixed conditions for a healthy engine.
Yes. The M274 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. The chain is maintenance-free but should be inspected for wear if noise occurs. Immediate attention to rattling or timing-related DTCs is essential.
Mercedes-Benz specifies SAE 5W-40 oil meeting MB 229.51 standard. This low-ash, high-shear-stability oil is critical for turbocharger and HPFP protection. Oil changes every 15,000 km or annually are required to maintain longevity and prevent sludge or fuel pump wear.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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