The Mercedes — Benz M 276.954 is a 2,996 cc, V6 twin — turbocharged petrol engine produced between 2012 and 2017. It features direct fuel injection (CGI), variable valve timing (VVT), and spray — guided combustion for enhanced efficiency. Delivering 270–328 kW (367–446 PS) and torque outputs of 510–600 Nm, it was engineered as a high — performance variant within the M 276 family for AMG — tuned applications.
Fitted to performance models including the C 63 AMG (W205), E 63 AMG (…
All production years (2012–2017) comply with Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/6790).
The Mercedes-Benz M 276.954 is a 2,996 cc V6 twin-turbocharged petrol engine engineered for high-performance applications (2012–2017). It combines direct fuel injection with twin-scroll turbochargers to deliver strong mid-range torque and rapid throttle response. Designed to meet Euro 6 emissions standards, it balances AMG-level performance with improved fuel efficiency over its naturally aspirated predecessor.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,996 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 88.0 mm × 82.1 mm | |
Power output | 270–328 kW (367–446 PS) | |
Torque | 510–600 Nm @ 1,800–4,500 rpm | |
Fuel system | Direct injection (CGI), high-pressure fuel pump (up to 200 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Twin IHI turbochargers with twin-scroll design | |
Timing system | Chain-driven (dual, front-mounted) | |
Oil type | MB 229.51 (SAE 5W-30) | |
Dry weight | 198 kg |
The Mercedes-Benz M 276.954 was used across Mercedes-Benz's W205/W213/C218 platforms with longitudinal mounting and reserved for AMG performance variants. This engine received platform-specific adaptations-reinforced mounts in the E 63 AMG and revised exhaust routing in the CLS 63 AMG-and from 2015 the introduction of revised camshaft profiles in the C 63 S created interchange limits. All adaptations are documented in OEM technical bulletins.
The M 276.954's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in high-mileage vehicles. Internal Mercedes-Benz quality reports from 2015 indicated a significant portion of pre-2015 engines required HPFP replacement before 120,000 km, while UK DVSA data shows petrol V6 engines account for a notable share of fuel system-related MOT advisories. Use of non-compliant fuel and extended oil intervals increase wear risk, making adherence to MB 229.51 specification and service schedules critical.
Analysis derived from Mercedes-Benz technical bulletins (2012-2017) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
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The M 276.954 offers strong performance and aggressive throttle response, but early models (2012–2014) are prone to high-pressure fuel pump wear. Later units, especially post-2015 revisions, show improved durability when maintained properly. Regular oil changes with MB 229.51-specified 5W-30 oil every 15,000 km are essential. Well-maintained engines can exceed 180,000 km without major issues.
Key issues include high-pressure fuel pump wear (especially pre-2015), intake manifold flap actuator failure, coolant leaks from heater pipe O-rings, and ignition coil degradation. These are documented in Mercedes-Benz service bulletins. Carbon buildup in direct injection models and turbocharger wastegate sticking are less frequent but possible.
This V6 twin-turbo petrol engine was used in several AMG performance models: the W205 C 63 AMG, W213 E 63 AMG, C218 CLS 63 AMG, and C166 GLE 63 AMG. It was phased out in 2018 and replaced by the M 177 V8. All variants are longitudinally mounted and paired with AMG SPEEDSHIFT transmissions.
Yes, with moderate gains. ECU remapping can yield +40–70 kW on most variants due to headroom in turbo and fuel systems. However, the twin-turbo design limits extreme tuning compared to dedicated performance engines. Supporting modifications like intercooler upgrades and exhaust systems improve responsiveness. Over-tuning risks detonation, especially if fuel quality is poor.
Fuel consumption is typical for a high-performance twin-turbo V6. In a W205 C 63, expect ~14.5 L/100 km (city) and ~8.5 L/100 km (highway), or about 19 mpg UK combined. Real-world figures depend heavily on driving style, but 16–20 mpg (UK) is common. Use of RON 98 fuel is required for optimal performance and longevity.
Yes. The M 276.954 is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. While chain systems are generally robust, any signs of chain rattle or tensioner failure should be addressed immediately to prevent catastrophic engine failure.
Mercedes-Benz specifies SAE 5W-30 oil meeting MB 229.51 standard. This low-SAPS formulation is critical for protecting the high-pressure fuel pump and turbochargers. Oil must be changed every 15,000 km or annually. Using non-compliant oil increases wear and voids warranty on repairs.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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