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-size models including the W205 C-Class, W213 E-Class, and X156 GLC-Class, the M 274.932 was engineered for dynamic driving and urban efficiency. It met Euro 6 emissions standards using a three-way catalytic converter, exhaust gas recirculation (EGR), and advanced engine management, with particulate filter integration introduced in later variants.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) drive mechanism, noted in Mercedes-Benz Service Bulletin 12.02.16. This issue, linked to torsional vibrations in the timing chain system, can lead to fuel delivery faults and engine stalling. From 2016, revised pump mounting and chain damper components were implemented to mitigate the risk.
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 twin-scroll turbo provides strong low-RPM torque ideal for urban driving but requires adherence to 15,000 km oil change intervals using MB 229.51 specification oil to ensure longevity of the high-pressure fuel pump and turbocharger. Cold-start idling should be limited to 30 seconds to ensure prompt oil circulation. Direct injection increases carbon buildup on intake valves; intake cleaning is recommended every 60,000 km. Post-2016 models feature revised HPFP mounting and chain damper; pre-2016 units should be inspected per Mercedes-Benz SIB 12 02 16. EGR systems require cleaning every 80,000 km to prevent flow restriction and fault codes.
Oil Specs: Requires MB 229.51 (0W-40) specification (Mercedes-Benz SIB 12 02 16). Compatible with ACEA C2 but not C3.
Emissions: Euro 6b certification applies to all models. Euro 6c compliance confirmed for 2016–2017 units with particulate filter (VCA Type Approval #VCA/EMS/8912).
Power Ratings: Measured under ECE R15-03 standards. Output consistent across fuel qualities meeting EN 228 RON 95 minimum.
Mercedes-Benz Technical Information System (TIS): Docs A32685, A32750, A32801, SIB 12 02 16
VCA Type Approval Database (VCA/EMS/8912)
ECE Regulation 15-03: Emissions Measurement Standards
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.
Locate the engine code stamped vertically on the left-side engine block near the exhaust manifold (Mercedes-Benz TIS A32685). The 7th VIN digit indicates engine family ('M' for M 274 series). Pre-2016 models have silver cam covers with black plastic intake manifolds; post-2016 units use black cam covers. Critical differentiation from M 270: M 274.932 has a twin-scroll turbocharger and revised intake plenum. Service parts require production date verification—high-pressure fuel pumps before 04/2016 are incompatible with later units due to mounting redesign (Mercedes-Benz SIB 12 02 16).
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.
Find answers to most commonly asked questions about MERCEDES-BENZ M274932.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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