The Mercedes-Benz M272.975 is a 3,498 cc, V6 petrol engine produced between 2010 and 2017. 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 higher-output form, it delivers 225 kW (306 PS) and 370 Nm of torque, offering enhanced performance for executive and luxury applications.
Fitted to models such as the W212 E-Class, W221 S-Class, and C207 CLS, the M272.975 was engineered for dynamic driving characteristics with improved throttle response and mid-range pull. Emissions compliance was achieved through a dual close-coupled three-way catalytic converter system and closed-loop lambda control, allowing Euro 5 compliance across its production run.
One documented concern is premature camshaft adjuster wear, particularly in early builds subjected to extended oil change intervals. This issue, referenced in Daimler Service Information Bulletin 272.975-01-08-05, stems from delayed oil pressure delivery to the dual VVT adjusters during cold starts. From 2013, revised camshaft adjusters with improved sealing and oil channel geometry were introduced to mitigate failure risk.
Production years 2010–2017 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5682).
The Mercedes-Benz M272.975 is a 3,498 cc V6 petrol engine engineered for mid-size and full-size platforms (2010–2017). It combines multi-point fuel injection with dual variable valve timing to deliver responsive performance and improved fuel efficiency. Designed to meet Euro 5 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 | 225 kW (306 PS) @ 6,500 rpm | |
| Torque | 370 Nm @ 2,400–5,000 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing chain (dual-row, front-mounted) | |
| Oil type | MB 229.5 (SAE 5W-40) | |
| Dry weight | 185 kg |
The naturally aspirated V6 design provides linear power delivery ideal for relaxed driving but demands strict adherence to 15,000 km oil service intervals to prevent dual camshaft adjuster wear and timing chain degradation. MB 229.5 (5W-40) oil is essential due to its specific viscosity and additive package protecting the variable valve timing system. Cold-start idling should be minimized to ensure prompt oil pressure build-up at the cam adjusters. The MPFI system is robust but sensitive to low-quality fuel, requiring regular use of premium unleaded (RON 98) to maintain valve cleanliness. Post-2013 models feature updated cam adjusters; pre-2013 units should be inspected per Daimler SIB 272.975-01-08-05. Catalytic converter longevity depends on proper lambda sensor function and avoidance of oil burning.
Oil Specs: Requires MB 229.5 specification (Daimler SIB 272.975-01-08-05). Compatible with ACEA A3/B4.
Emissions: Euro 5 certification applies to all production years (VCA Type Approval #VCA/EMS/5682).
Power Ratings: Measured under DIN 70020 standards. Output assumes RON 98 fuel and factory ECU calibration (Daimler TIS Doc. A34011).
Daimler Technical Information System (TIS): Docs A32871, A33123, SIB 272.975-01-08-05
VCA Type Approval Database (VCA/EMS/5682)
ISO 1585: Road vehicles — Engine test code — Net power
The Mercedes-Benz M272.975 was used across Mercedes-Benz's W212/W221/C207 platforms with longitudinal mounting and no licensed partnerships. This engine received platform-specific adaptations-revised cooling routing in the W221 and shortened intake manifolds in the C207-and from 2013 the updated camshaft adjuster design was implemented across all applications, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the exhaust manifold (Daimler TIS A33016). The 8th VIN digit indicates engine family ('2' for M272 series). Pre-2013 models have silver cam covers with black intake manifolds; post-2013 units use black cam covers. Critical differentiation from M272.963: Original M272.975 uses Bosch ME 7.10 ECU with 120-pin connector, while M272.963 uses ME 7.10 with 120-pin but different calibration. Service parts require production date verification - cam adjusters before 09/2013 are incompatible with later units due to internal redesign (Daimler SIB 272.975-01-08-05).
The M272.975's primary reliability risk is dual camshaft adjuster wear on early builds, with elevated incidence in short-trip urban use. Internal Daimler quality reports from 2014 indicated a significant share of pre-2013 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 (2010-2017) and UK DVSA failure statistics (2015-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M272975.
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