The Mercedes-Benz M272.942 is a 3,498 cc, V6 petrol engine produced between 2005 and 2011. It features a DOHC 24-valve configuration with variable valve timing (VVT) on both intake and exhaust camshafts and third-generation direct fuel injection (CGI – Charged Gasoline Injection). In standard tune it delivers 200 kW (272 PS) and 370 Nm of torque, positioning it as a mid-range performance engine within the M272 family for executive and grand touring applications.
Fitted to models such as the W211 E-Class, W220 S-Class, and W219 CLS, the M272.942 was engineered for smooth power delivery, refinement, and strong mid-range responsiveness. Emissions compliance was achieved through close-coupled three-way catalytic converters and precise lambda control, enabling Euro 4 compliance across its production run, with select markets meeting partial Zero-Emission Vehicle (ZEV) requirements under EU Directive 2007/46/EC.
One documented concern is high-pressure fuel pump (HPFP) degradation, particularly under sustained high-load operation. This issue, referenced in Mercedes-Benz Service Information Bulletin 272.942-01-03, arises from cam follower wear in the HPFP drive mechanism. From 2008 onward, an updated HPFP design with reinforced cam follower and revised lubrication path was introduced to improve durability.
All production years (2005–2011) meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/6789). Select export markets comply with early Euro 5 specifications pending local certification.
The Mercedes-Benz M272.942 is a 3,498 cc V6 petrol engine engineered for executive and luxury platforms (2005–2011). It combines third-generation CGI direct injection with dual variable valve timing to deliver refined performance and drivability. Designed to meet Euro 4 emissions standards, it balances smooth power delivery with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,498 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 92.9 mm × 86.0 mm | |
| Power output | 200 kW (272 PS) @ 6,000 rpm | |
| Torque | 370 Nm @ 2,400–5,000 rpm | |
| Fuel system | Third-generation CGI direct injection (up to 120 bar) | |
| Emissions standard | Euro 4 (2005–2011), market-dependent early Euro 5 variants | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven (dual overhead, front-mounted) | |
| Oil type | MB 229.51 (SAE 5W-40) | |
| Dry weight | 182 kg |
The CGI direct injection system enables strong mid-range torque and crisp throttle response but increases susceptibility to intake valve carbon buildup, especially in urban driving cycles. MB 229.51 (5W-40) oil is essential for longevity of the high-pressure fuel pump and valvetrain components. Regular inspection of the HPFP cam follower is recommended every 80,000 km per technical bulletin. The naturally aspirated design provides linear power delivery but places higher demand on fuel system integrity. From 2008, the revised HPFP with improved lubrication reduces failure risk. Emissions systems require periodic DTC monitoring to ensure catalytic converter efficiency and lambda sensor operation.
Oil Specs: Requires MB 229.51 specification (Mercedes-Benz SIB 272.942-01-01). Supersedes ACEA A3/B4 standards.
Emissions: Certified to Euro 4 for all markets (2005–2011) under VCA Type Approval #VCA/EMS/6789. Limited early Euro 5 compliance in Switzerland and Norway via supplementary testing.
Power Ratings: Measured under ISO 1585 standards. Full output requires 98 RON fuel (Mercedes-Benz TIS Doc. A36011).
Mercedes-Benz Technical Information System (TIS): Docs A35720, A36011, SIB 272.942-01-01, SIB 272.942-01-03
VCA Type Approval Database (VCA/EMS/6789)
ISO 1585: Road vehicles — Test method for the measurement of fuel consumption
The Mercedes-Benz M272.942 was used across Mercedes-Benz's W211/W220 platforms with longitudinal mounting and shared architecture with the M272.922. This engine received platform-specific adaptations-intake manifold revisions in the W211 and enhanced cooling in the W220-and from 2008 the updated W211 facelift adopted the revised HPFP design, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the timing cover (Mercedes-Benz TIS A35720). The 8th VIN digit indicates engine type ('2' for M272 series). Pre-2008 models feature a silver intake manifold with black plastic cam covers; post-2008 units use a revised black intake manifold and updated HPFP housing. Critical differentiation from M272.922: M272.942 has higher compression (11.0:1) and revised ECU calibration for increased torque. Service parts require production date verification – HPFP assemblies for pre-2008 builds are not compatible with post-2008 revisions due to internal design changes (Mercedes-Benz SIB 272.942-01-03).
The M272.942's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in high-load driving cycles. Internal Mercedes quality reports from 2010 noted increased HPFP-related DTCs in pre-2008 builds, while UK DVSA MOT records show a notable share of emissions failures linked to lean mixture codes in high-mileage units. Extended service intervals and low fuel levels increase HPFP wear, making adherence to maintenance schedules critical.
Analysis derived from Mercedes-Benz technical bulletins (2005-2011) and UK DVSA failure statistics (2014-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M272942.
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Regulation (EC) No 715/2007
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