The Mercedes — Benz M 270.920 is a 1,991 cc, inline — four petrol engine produced between 2011 and 2016. It forms part of the modular M 270/M 274 engine family designed for transverse and longitudinal applications respectively. Featuring turbocharging, direct fuel injection (BlueDIRECT), and variable valve timing (CAMTRONIC), it delivers responsive performance with improved fuel efficiency. Output ranges from 120 kW (163 PS) to 155 kW (211 PS), depending on applicati…
Production years 2011–2015 meet Euro 5 standards; 2015–2016 models comply with Euro 6b depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Mercedes-Benz M 270.920 is a 1,991 cc inline-four turbocharged petrol engine engineered for compact front-wheel-drive platforms (2011–2016). It combines BlueDIRECT direct injection with CAMTRONIC variable valve timing to deliver responsive throttle characteristics and improved combustion efficiency. Designed to meet Euro 5 and later Euro 6b emissions standards, it balances performance with fuel economy in entry-level luxury applications.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,991 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 83.0 mm × 92.0 mm | |
Power output | 120–155 kW (163–211 PS) | |
Torque | 250–350 Nm @ 1,200–4,000 rpm | |
Fuel system | BlueDIRECT direct injection (up to 200 bar) | |
Emissions standard | Euro 5; later models Euro 6b | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled, electric thermostat | |
Turbocharger | Single-scroll turbocharger with wastegate | |
Timing system | Dual chain (primary and secondary) | |
Oil type | MB 229.51 (SAE 5W-30) | |
Dry weight | 135 kg |
The Mercedes-Benz M 270.920 was used across Mercedes-Benz's W176/W246/X156 platforms with transverse mounting and shared design elements with the M 274 longitudinal variant. This engine received platform-specific adaptations-shorter intake tracts in the A-Class and enhanced cooling in GLA-Class SUV applications-and from 2015 the facelifted B-Class adopted revised ECU calibration for improved throttle response, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The M 270.920's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in mixed urban/highway driving. Internal Daimler quality reports from 2014 noted a significant portion of pre-2014 units requiring HPFP replacement before 120,000 km, while UK DVSA data links a notable share of fuel system-related MOT advisories to fuel trim faults in this engine family. Frequent short trips and low-octane fuel increase pump and injector stress, making fuel quality and oil change adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2011-2016) and UK DVSA failure statistics (2016-2023). Repair procedures should follow manufacturer guidelines.
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The M 270.920 offers strong performance and efficiency, but early models (2011-2013) are prone to high-pressure fuel pump wear. Later revisions (2014+) with updated pump design show improved durability. When maintained properly—using correct oil (MB 229.51) and high-octane fuel—these engines can reliably exceed 150,000 km.
Key issues include high-pressure fuel pump failure, intake valve coking due to direct injection, turbo wastegate sticking, and coolant leaks from the thermostat housing. These are documented in Mercedes-Benz service bulletins and confirmed through UK DVSA inspection data.
The M 270.920 was used in transverse-platform models including the A-Class (W176), B-Class (W246), CLA-Class (C117), and GLA-Class (X156) from 2011 to 2016. It powered A 180, A 200, B 200, CLA 250, and GLA 250 variants, primarily in European and UK markets meeting Euro 5 and Euro 6b standards.
Yes. The M 270.920 responds well to ECU remapping, with stage 1 tunes typically adding +30-40 kW. Stock internals handle moderate increases, but supporting mods (intercooler, exhaust) are recommended for higher outputs. Tuning should preserve fuel and temperature safety margins to avoid engine damage.
In combined driving, the M 270.920 achieves approximately 6.5–7.5 L/100km (35–43 mpg UK). Real-world consumption varies by model and driving style. The A 200 and B 200 typically return 40–45 mpg UK on mixed routes, while aggressive driving reduces efficiency significantly.
Yes. The M 270.920 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can occur, resulting in severe internal damage. Regular inspection of the chain tensioner and guides is essential to prevent costly repairs.
Mercedes specifies SAE 5W-30 oil meeting MB 229.51 standard. This low-SAPS synthetic oil is critical for turbocharger and timing chain longevity. Oil changes should be performed every 15,000 km or annually to maintain fuel pump lubrication and overall engine health.
Comprehensive technical documentation and regulatory references
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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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