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…
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 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.
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.
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The M 274.910 is generally robust when maintained properly. Pre-2015 models are prone to high-pressure fuel pump wear, which can lead to hard starting and misfires if ignored. Later models (post-2015) benefited from updated pumps and improved durability. Regular oil changes with MB 229.51 spec oil every 15,000 km are essential. With proper care, these engines can exceed 200,000 km.
The most documented issues are high-pressure fuel pump wear (especially pre-2015), intake valve carbon buildup affecting idle, oil leaks from valve covers and front seal, and coolant leaks from the plastic thermostat housing. These are confirmed in Mercedes-Benz service bulletins and field reports. Preventative maintenance greatly reduces risk.
The M 274.910 was used in several compact and mid-size models: W205 C-Class (C 200/C 250/C 450 AMG), W176 A-Class (A 200/A 250), X156 GLA-Class (GLA 200/GLA 250), C117 CLA-Class, and W246 B-Class. All applications are Euro 6 compliant and feature transverse mounting. No external licensing to other manufacturers occurred.
Yes. ECU remapping can yield +30–50 kW gains safely by optimizing ignition, fuel, and boost maps. Aftermarket intake, exhaust, and intercooler upgrades further enhance flow. However, the factory turbocharger limits peak gains. Tuning should preserve factory safety margins and cooling capacity to avoid long-term reliability issues.
In combined driving, expect 7–9 L/100km (32–40 mpg UK). Highway cruising can achieve ~6.0 L/100km (47 mpg UK), while city driving may exceed 10 L/100km (28 mpg UK). Real-world figures depend heavily on driving style, vehicle weight, and transmission tuning.
No. The M 274.910 uses a non-interference valvetrain design. If the timing chain fails, pistons will not contact valves, preventing catastrophic internal damage. However, timing integrity is still critical for performance and emissions compliance.
Mercedes-Benz specifies SAE 5W-30 oil meeting MB 229.51 standard. This low-ash, mid-SAPS formulation protects direct injection components and is compatible with oxygen sensors and catalytic converters. Oil changes every 15,000 km or annually are recommended to maintain fuel pump and turbo longevity.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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.
Vehicle Certification Agency (VCA)
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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