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.
Fitted to m…
All M274.930 engines comply with Euro 5 emissions standards .
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 | Refer to vehicle handbook / manufacturer specification | |
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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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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.
Aftermarket ECU tuning is common on the M274930 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
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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GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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