The Mercedes-Benz M 274.910 is a 1,991 cc, inline-four turbocharged petrol engine produced between 2013 and 2017. It features dual overhead camshafts (DOHC), variable valve timing (VVT) on both intake and exhaust camshafts, and direct fuel injection (BlueDIRECT). In standard tune, it delivered 155 kW (211 PS), with higher outputs reaching 180 kW (245 PS) in AMG Line and C-Class Coupe applications, producing torque between 350–370 Nm.
Fitted to key compact and mid-size platforms including the W205 C-Class, W176 A-Class, and X156 GLA-Class, the M 274.910 was engineered for responsive performance and improved fuel efficiency in transversely mounted applications. Its design prioritized compact packaging, low-end torque delivery, and emissions compliance. Emissions control was achieved via three-way catalysts, EGR, and OBD-II monitoring, meeting Euro 6 standards across all markets.
One documented technical update occurred in 2015, addressing early high-pressure fuel pump wear (Mercedes-Benz Service Bulletin 07-2015-01). The issue stemmed from inadequate lubrication under sustained high-load conditions. Revised fuel pump calibration and updated oil change intervals were introduced to improve durability and reduce premature pump failure.
All production years 2013–2017 meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Mercedes-Benz M 274.910 is a 1,991 cc inline-four turbocharged petrol engine designed for transverse applications (2013–2017). It combines direct injection with twin-scroll turbocharging to deliver responsive acceleration and improved fuel economy. Engineered to meet Euro 6 standards, it balances performance with emissions compliance in compact and mid-size models.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,991 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-four, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 92.0 mm | |
| Power output | 155–180 kW (211–245 PS) | |
| Torque | 350–370 Nm @ 1,200–4,000 rpm | |
| Fuel system | Direct injection (BlueDIRECT), multi-point injection (secondary) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbocharger (BorgWarner) | |
| Timing system | Dual chain (primary and secondary), non-interference design | |
| Oil type | MB 229.51 (SAE 5W-30) | |
| Dry weight | 152 kg |
The twin-scroll turbo provides strong low-RPM torque ideal for urban driving but requires adherence to 15,000 km oil service intervals to protect the high-pressure fuel pump and turbocharger. MB 229.51 (5W-30) oil is critical due to its enhanced shear stability and anti-wear additives for direct injection systems. Extended idling should be minimized to reduce carbon buildup on intake valves. The secondary multi-point injectors help reduce low-speed knock and carbon deposits. Post-2015 models feature updated fuel pump calibration; pre-2015 units should follow SIB 07-2015-01 for inspection and replacement. Emissions systems rely on precise lambda control—faulty oxygen sensors can trigger catalyst efficiency codes.
Oil Specs: Requires MB 229.51 (5W-30) specification (Mercedes-Benz SIB 07-2015-01). Compatible with ACEA C2.
Emissions: Euro 6 certification applies to all production years (2013–2017) (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under DIN 70020 standards. 180 kW output applies to C 450 AMG and C 250 Coupe variants (Mercedes-Benz TIS Doc. A001904).
Mercedes-Benz Technical Information System (TIS): Docs A001904, A005904, SIB 07-2015-01
VCA Type Approval Database (VCA/EMS/6789)
ISO 1585:1996 Road vehicles — Test code for net power of internal combustion engines
The Mercedes-Benz M 274.910 was used across Mercedes-Benz's W205/W176/X156 platforms with transverse mounting and no licensed external applications. This engine received platform-specific adaptations-intake tuning for the GLA-Class and revised engine mounts for the C-Class-and from 2015, updated high-pressure fuel pumps were introduced to improve longevity, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side engine block near the exhaust manifold (Mercedes-Benz TIS A001904). The 8th VIN digit indicates engine type ('2' for M 274 series). Pre-2015 models have silver valve covers with 'M 274' engraving; post-2015 units use black valve covers. Critical differentiation from M 270: M 274.910 has a larger displacement (1,991 cc) and twin-scroll turbocharger, while M 270 is a 1,991 cc unit with single-scroll turbo. Service parts require production date verification—high-pressure fuel pumps before 06/2015 are subject to wear and should be replaced per SIB 07-2015-01.
The M 274.910's primary reliability risk is high-pressure fuel pump wear in pre-2015 builds, with elevated incidence in vehicles with extended oil intervals. Internal Mercedes-Benz quality reports from 2016 indicated a significant number of pre-facelift engines required pump replacement before 120,000 km, while UK DVSA MOT data links a portion of engine-related failures to fuel system neglect. High-load cycles and infrequent oil changes increase pump wear, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2013-2017) and UK DVSA failure statistics (2015-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M274910.
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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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