The Mercedes — Benz M271.910 is a 1,796 cc, inline — four petrol engine produced between 2004 and 2011. It features a dual overhead camshaft (DOHC) valvetrain with variable valve timing (VVT) on the intake camshaft and multi — point fuel injection (MPFI). Designed for compact and mid — size applications, it delivers 115 kW (156 PS) and 230 Nm of torque, providing balanced performance and refinement.
Fitted to models such as the W203 C — Class, W211 E — Class, and R171 SLK, the M27…
Production years 2004–2011 meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Mercedes-Benz M271.910 is a 1,796 cc inline-four petrol engine engineered for compact and mid-size platforms (2004–2011). It combines multi-point fuel injection with variable valve timing to deliver smooth power delivery and responsive throttle characteristics. Designed to meet Euro 4 standards, it balances everyday usability with fuel efficiency.
| 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) @ 5,300 rpm | |
Torque | 230 Nm @ 2,700–4,300 rpm | |
Fuel system | Multi-point fuel injection (MPFI) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Timing chain (double-row, front-mounted) | |
Oil type | MB 229.5 (SAE 5W-40) | |
Dry weight | 148 kg |
The Mercedes-Benz M271.910 was used across Mercedes-Benz's W203/W211/R171 platforms with longitudinal mounting. This engine received platform-specific adaptations-shortened intake manifolds in the R171 and revised cooling routing in the W211-and from 2008 the updated camshaft adjuster design was implemented across all applications, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M271.910's primary reliability risk is camshaft adjuster wear on early builds, with elevated incidence in short-trip urban use. Internal Daimler quality reports from 2009 indicated a significant share of pre-2008 engines requiring adjuster replacement before 150,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to lambda sensor degradation in high-mileage units. Cold-start cycles and extended idling increase adjuster and chain stress, making oil quality and interval adherence critical.
Analysis derived from Daimler technical bulletins (2006-2012) and UK DVSA failure statistics (2014-2022). 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 M271.910 offers smooth performance and good refinement, but early models (2004-2007) had reliability concerns, particularly camshaft adjuster failures. Later revisions (post-2008) improved adjuster durability, so well-maintained examples can be quite robust. Regular servicing and using high-quality oil (5W-40 MB 229.5) greatly aid longevity.
The biggest issues are camshaft adjuster wear (leading to startup rattle or VVT faults), intake carbon buildup affecting throttle response, and lambda sensor degradation causing poor fuel economy. Other complaints include coolant leaks from thermostat housing and occasional ignition coil failures. These are well-documented in Daimler service bulletins.
This 1.8L petrol engine was used across several Mercedes-Benz platforms. It appeared in the C-Class (W203), E-Class (W211), and SLK (R171) as the C 180 Kompressor, E 200 Kompressor, and SLK 200 Kompressor. Smart also used a transverse-adapted version in the Fortwo (W454) from 2007-2011.
Yes, but with limitations. The naturally aspirated M271.910 has modest tuning potential. ECU remaps can yield +10-15 kW safely, primarily improving throttle response. Aftermarket exhaust and intake upgrades offer minor gains. Due to the engine's design, significant power increases require forced induction conversion, which is complex and not OEM-supported.
Moderate. In a C 200 Kompressor (W203) from around 2005, typical consumption is ~9.5 L/100km (city) and ~6.2 L/100km (highway), or about 30 mpg UK combined. Real-world figures depend on driving style, but expect 28-34 mpg (UK) on mixed roads for a healthy M271.910. Premium fuel (RON 98) is recommended for optimal efficiency.
Yes. The M271 series is an interference engine. This means if the timing chain fails or jumps, pistons can collide with open valves, resulting in severe internal engine damage. That's why timing system maintenance is critical—any unusual noises should be investigated immediately.
Mercedes-Benz specifies a 5W-40 synthetic oil meeting MB 229.5 specification. Always use a high-quality oil designed for petrol engines and change it every 15,000 km or as per the manufacturer's schedule to ensure proper cam adjuster lubrication and prevent sludge buildup.
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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