The Mercedes — Benz M272.941 is a 3,498 cc, V6 petrol engine produced between 2005 and 2010. It features a dual overhead camshaft (DOHC) valvetrain with variable valve timing (VVT) on both intake and exhaust camshafts and multi — point fuel injection (MPFI). In standard tune, it delivers 180 kW (245 PS) and 350 Nm of torque, providing strong mid — range performance for executive and luxury applications.
Fitted to models such as the W211 E — Class, W220 S — Class, and W203 C — Class…
Production years 2005–2010 meet Euro 4 emissions standards .
The Mercedes-Benz M272.941 is a 3,498 cc V6 petrol engine engineered for mid-size and full-size platforms (2005–2010). It combines multi-point fuel injection with dual variable valve timing to deliver smooth power delivery and responsive throttle characteristics. Designed to meet Euro 4 standards, it balances refinement with performance for executive driving.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,498 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 88.0 mm × 92.0 mm | |
Power output | 180 kW (245 PS) @ 6,000 rpm | |
Torque | 350 Nm @ 2,400–5,000 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 (dual-row, front-mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 185 kg |
The Mercedes-Benz M272.941 was used across Mercedes-Benz's W211/W220/W203 platforms with longitudinal mounting and no licensed partnerships. This engine received platform-specific adaptations-revised cooling routing in the W220 and shortened intake manifolds in the W203-and from 2008 the updated camshaft adjuster design was implemented across all applications, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The M272.941 offers smooth performance and good refinement, but early models (2005-2007) had reliability concerns, particularly dual 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 dual 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 3.5L petrol engine was used across several Mercedes-Benz platforms. It appeared in the E-Class (W211), S-Class (W220), C-Class (W203), and CLK-Class (C209) as the E 350, S 350, C 350, and CLK 350. No licensed partnerships or transverse adaptations are documented for this variant.
Aftermarket ECU tuning is common on the M272941 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Moderate. In an E 350 (W211) from around 2007, typical consumption is ~12.5 L/100km (city) and ~7.8 L/100km (highway), or about 23 mpg UK combined. Real-world figures depend on driving style, but expect 21-26 mpg (UK) on mixed roads for a healthy M272.941. Premium fuel (RON 98) is recommended for optimal efficiency.
Yes. The M272 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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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
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