The Mercedes-Benz M 276.822 is a 3,498 cc, V6 naturally aspirated petrol engine produced between 2012 and 2017. It features dual overhead camshafts (DOHC), variable valve timing (VVT) on both intake and exhaust camshafts, and direct fuel injection (BlueDIRECT). In standard configuration, it delivered 200–240 kW (272–326 PS) and 370–380 Nm of torque, providing smooth power delivery ideal for mid-luxury applications.
Fitted to models such as the W204 C-Class, W212 E-Class, and W218 CLS-Class – including the C350, E350, and CLS350 – the M 276.822 was engineered for balanced performance, refinement, and efficiency. Emissions compliance was achieved through advanced engine management, close-coupled catalytic converters, and exhaust gas recirculation (EGR), enabling Euro 6 compliance across all production years.
One documented concern is premature high-pressure fuel pump (HPFP) wear, particularly in early production units. This issue, highlighted in Mercedes-Benz Service Bulletin 276.822-01/13, is attributed to inadequate lubrication and debris accumulation in the fuel rail. In 2014, a revised HPFP with improved internal coatings and filtration was introduced, significantly reducing failure incidence.
All production years (2012–2017) meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Mercedes-Benz M 276.822 is a 3,498 cc V6 naturally aspirated petrol engine engineered for mid-luxury vehicles (2012–2017). It combines direct injection (BlueDIRECT) with variable valve timing to deliver smooth power delivery and responsive throttle characteristics. Designed to meet Euro 6 standards, it balances performance with improved fuel economy over previous V6 designs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,498 cc | |
| Fuel type | Petrol | |
| Configuration | 60° V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 88.0 mm × 92.0 mm | |
| Power output | 200–240 kW (272–326 PS) | |
| Torque | 370–380 Nm @ 3,500–5,200 rpm | |
| Fuel system | Direct injection (BlueDIRECT), multi-hole injectors | |
| Emissions standard | Euro 6 | |
| Compression ratio | 11.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Double-row roller chain (integrated VVT) | |
| Oil type | MB 229.51 (SAE 5W-30) | |
| Dry weight | 187 kg |
The naturally aspirated V6 provides linear power delivery ideal for relaxed driving but requires adherence to 15,000 km oil change intervals using MB 229.51 (5W-30) specification oil to prevent VVT and fuel pump wear. MB 229.51 is critical due to its low-SAPS formulation and thermal stability, protecting the BlueDIRECT system. Extended idling or short-trip driving accelerates carbon buildup in the intake and EGR system. Fuel quality must meet EN 228 standards to ensure reliable operation of the high-pressure injectors. Post-2014 models feature upgraded fuel pumps; pre-2014 units should be inspected per SIB 276.822-01/13. EGR and catalytic converters require periodic monitoring to maintain emissions compliance.
Oil Specs: Requires MB 229.51 (5W-30) specification (Mercedes SIB 276.822-01/13). Supersedes ACEA C3 requirements.
Emissions: Euro 6 certification applies to all production years (2012–2017) (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under DIN 70020 standards. 240 kW output requires premium 98 RON fuel (Daimler TIS Doc. A33005).
Daimler Technical Information System (TIS): Docs A33150, A33512, SIB 276.822-01/13
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585 Road vehicles — Test method for the measurement of mass and power
The Mercedes-Benz M 276.822 was used across Mercedes-Benz's W204/W212 platforms with longitudinal mounting and shared architecture with AMG variants in high-performance applications. This engine received platform-specific adaptations-reinforced engine mounts in the W218 and revised intake manifolds in the W212-and from 2014 the facelifted W204 models adopted updated fuel pumps, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-right cylinder bank near the alternator (Daimler TIS A33180). The 8th VIN digit indicates engine family ('6' for M276 series). Pre-2014 models have silver cam covers with black intake manifolds; post-2014 units use black cam covers. Critical differentiation from M276.820: M276.822 has revised fuel pump and BlueDIRECT tuning. Service parts require production date verification - fuel pumps for engines before 06/2014 are incompatible with later units due to internal redesign (Mercedes SIB 276.822-01/13).
The M 276.822's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in mixed urban/highway use. Internal Daimler quality reports from 2014 indicated a notable share of pre-2014 engines requiring pump replacement before 120,000 km, while UK DVSA records show increased catalytic converter failures in vehicles with poor maintenance. Extended idling and low oil change frequency increase pump and EGR stress, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2013–2017) and UK DVSA failure statistics (2017–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M276822.
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Regulation (EC) No 715/2007
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