The Mercedes — Benz M 274.932 is a 1,991 cc, inline — four turbocharged petrol engine produced between 2014 and 2017. It features dual overhead camshafts (DOHC), variable valve timing (VVT) on both intake and exhaust, and direct fuel injection with spray — guided combustion. In standard tune it delivered 155 kW (211 PS) and 350 Nm of torque, offering responsive performance and improved fuel efficiency over naturally aspirated predecessors.
Fitted to key compact and mid — s…
All models meet Euro 6b standards; 2016–2017 units with particulate filter comply with Euro 6c (VCA UK Type Approval #VCA/EMS/8912).
The Mercedes-Benz M 274.932 is a 1,991 cc inline-four turbocharged petrol engine developed for compact and executive platforms (2014–2017). It combines direct injection with twin-scroll turbocharging to deliver strong low-end torque and responsive mid-range power. Designed to meet Euro 6b (and select Euro 6c) standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,991 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
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 (spray-guided, up to 200 bar) | |
Emissions standard | Euro 6b; Euro 6c with particulate filter (2016–2017) | |
Compression ratio | 10.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbo (BorgWarner) | |
Timing system | Double-row roller chain with hydraulic tensioner | |
Oil type | MB 229.51 (SAE 0W-40) | |
Dry weight | 166 kg |
The Mercedes-Benz M 274.932 was used across Mercedes-Benz's W205, W213, and X156 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-shortened accessory drives in the W205 and reinforced engine mounts in the X156-and from 2016 the facelifted W213 models adopted revised high-pressure fuel pump mounts, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M 274.932's primary reliability risk is high-pressure fuel pump drive wear on early builds, with elevated incidence in stop-start urban use. Internal Mercedes-Benz quality reports from 2017 indicated a notable share of pre-2016 engines required HPFP replacement before 120,000 km, while UK DVSA records show fuel system-related faults contribute to emissions test failures in city-driven vehicles. Frequent cold starts and extended idling increase torsional stress on the drive mechanism, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2015-2018) and UK DVSA failure statistics (2018-2022). Repair procedures should follow manufacturer guidelines.
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The M 274.932 offers responsive performance and good efficiency, but early models (2014–2015) are prone to high-pressure fuel pump drive wear. Later revisions (post-2016) feature improved pump mounting and chain dampers, significantly enhancing durability. With regular maintenance and correct oil (MB 229.51 0W-40), well-maintained units can reliably exceed 180,000 km.
The most documented issues are high-pressure fuel pump drive wear (causing stalling and misfires), oil leaks from valve cover gaskets, intake valve carbon buildup, and coolant pump impeller failure. These are confirmed in Mercedes-Benz service bulletins and field reports, with the HPFP issue being the most critical.
This 2.0L turbocharged petrol was used in several key models: C 250 (W205), E 250 (W213), GLC 250 (X156), and CLA 250 (C117), primarily from 2014 to 2017. It was not licensed to other manufacturers and was succeeded by the M 264 engine in most applications.
Yes, the M 274.932 responds well to ECU remapping, typically gaining 30–40 kW safely. Performance intakes, exhausts, and intercoolers can further increase output. However, tuning should not exceed the fuel pump's delivery capacity, and upgraded cooling is recommended for sustained high-load use.
Efficient for a turbocharged petrol. In a W205 C 250, combined consumption is approximately 7.0 L/100 km (40.4 mpg UK), with city driving around 9.0 L/100 km and highway as low as 5.8 L/100 km. Real-world figures depend heavily on driving style, but expect 35–42 mpg UK under mixed conditions.
Yes. The M 274 series is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. While chain failure is rare, HPFP drive wear can indicate underlying timing issues, so early diagnosis of stalling or fault codes is essential.
Mercedes-Benz specifies SAE 0W-40 oil meeting MB 229.51 standard. This low-SAPS formulation is critical for protecting the high-pressure fuel pump and turbocharger. Oil changes should be performed every 15,000 km or annually to maintain component longevity and prevent sludge buildup.
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).
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UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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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