The Mercedes — Benz M 271.950 is a 1,796 cc, inline — four petrol engine produced between 2008 and 2015. It features a naturally aspirated design with twin overhead camshafts (DOHC), 16 — valve configuration, and variable valve timing (VVT) on both intake and exhaust camshafts. It delivers 115 kW (156 PS) and 230 Nm of torque, powering compact and mid — size models with a focus on smooth urban drivability.
Fitted primarily to the C — Class (W204), E — Class (W212), and CLC — Class (…
All production years (2008–2015) comply with Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Mercedes-Benz M 271.950 is a 1,796 cc inline-four petrol engine engineered for compact and executive applications (2008–2015). It features naturally aspirated aspiration with variable valve timing to deliver smooth power delivery and strong mid-range response. Designed to meet Euro 5 emissions standards, it balances efficiency with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,796 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.0 mm × 85.0 mm | |
Power output | 115 kW (156 PS) | |
Torque | 230 Nm @ 3,000–4,600 rpm | |
Fuel system | Sequential multi-port fuel injection (ME 7.8 ECU) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.3:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven (double-row, wear-resistant) | |
Oil type | MB 229.5 (SAE 5W-40) | |
Dry weight | 136 kg |
The Mercedes-Benz M 271.950 was used across Mercedes-Benz's W204/W212 platforms with longitudinal mounting. This engine received platform-specific adaptations-tuned intake manifolds in the C-Class and revised exhaust routing in the E-Class-and from 2011 the facelifted W204 models adopted updated piston rings and ECU mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M 271.950's primary reliability concern is elevated oil consumption in pre-2011 models, with internal Mercedes quality reports from 2012 indicating over 12% of early units required piston ring service before 120,000 km. UK DVSA MOT data shows increased emissions-related failures in high-mileage units, particularly from carbon-fouled intake systems. Short-trip driving and extended oil intervals accelerate ring wear, making fluid quality and service adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2010-2015) and UK DVSA failure statistics (2012-2020). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M 271.950 is generally reliable, but pre-2011 models have documented oil consumption issues due to piston ring design. Later revisions (post-2011) significantly improved oil control. When maintained with regular oil changes (MB 229.5 spec) and coolant service, these engines can exceed 200,000 km. The chain-driven timing system is durable, and major internal failures are rare in well-serviced units.
The most documented issues are excessive oil consumption in pre-2011 models, intake manifold flap malfunction, cooling system leaks (water pump/thermostat), and ignition coil degradation. These are covered in Mercedes-Benz service bulletins. Oil leaks from valve cover gaskets are also common on high-mileage engines.
This 1.8L petrol engine was used in several Mercedes-Benz models: C-Class (W204), E-Class (W212), and CLC-Class (CL203). It powered C 200, E 200, and CLC 200 variants between 2008 and 2015. All versions are naturally aspirated, replacing earlier Kompressor variants in base trims.
The M 271.950 has limited tuning potential due to its naturally aspirated design. ECU remapping can yield modest gains (~10–15 kW) by optimizing throttle response and fuel mapping. However, the engine lacks forced induction, limiting headroom. Supporting mods like intake and exhaust upgrades offer minimal returns. Tuning is uncommon and generally not cost-effective for this engine.
In a C 200 (W204), typical consumption is ~9.8 L/100km (city) and ~5.8 L/100km (highway), or about 40 mpg UK combined. The E 200 (W212) sees slightly higher consumption due to weight (~10.5 L/100km city). Real-world figures depend on driving style, but expect 35–45 mpg (UK) on mixed roads for healthy units.
Yes. The M 271 series is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, causing catastrophic engine damage. While the chain is durable, any unusual noise from the front of the engine should be investigated immediately to prevent costly repairs.
Mercedes-Benz specifies SAE 5W-40 oil meeting MB 229.5 standard. This full-synthetic oil is essential for protecting the timing chain and piston rings under high thermal loads. Change intervals should not exceed 15,000 km or one year, whichever comes first, to ensure long-term reliability and minimize oil consumption.
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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