The Mercedes — Benz M 279.980 is a 5,980 cc, V12 naturally aspirated petrol engine produced between 2012 and 2019. It features dual overhead camshafts (DOHC), variable valve timing (VVT) on both intake and exhaust camshafts, and direct fuel injection (BlueDIRECT). Delivering 463–530 kW (630–720 PS) and 830–1,000 Nm of torque, it provides effortless power delivery ideal for flagship grand touring applications.
Fitted to models such as the W222 S — Class and C217 CLS — Clas…
All production years (2012–2019) meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/8901).
The Mercedes-Benz M 279.980 is a 5,980 cc V12 naturally aspirated petrol engine engineered for flagship luxury vehicles (2012–2019). It combines direct injection (BlueDIRECT) with variable valve timing and cylinder deactivation to deliver smooth, silent power delivery and responsive throttle characteristics. Designed to meet Euro 6 standards, it balances extreme performance with acceptable fuel economy for its class.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,980 cc | |
Fuel type | Petrol | |
Configuration | 60° V12, DOHC, 48-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 89.9 mm × 78.2 mm | |
Power output | 463–530 kW (630–720 PS) | |
Torque | 830–1,000 Nm @ 1,900–3,600 rpm | |
Fuel system | Direct injection (BlueDIRECT), multi-hole injectors | |
Emissions standard | Euro 6 | |
Compression ratio | 10.0:1 | |
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 | 245 kg |
The Mercedes-Benz M 279.980 was used across Mercedes-Benz's W222/C217 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 W222 and revised intake manifolds in the C217-and from 2015 the facelifted W222 models adopted updated fuel pumps, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M 279.980'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 2015 indicated a notable share of pre-2015 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 (2013–2019) and UK DVSA failure statistics (2019–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M 279.980 delivers exceptional performance and refinement, but early models (2012–2015) had reliability concerns, especially high-pressure fuel pump failures. Later revisions (post-2015) improved pump durability, so well-maintained examples can be robust. Regular servicing and using high-quality oil (5W-30 MB 229.51) greatly aid longevity.
The biggest issues are high-pressure fuel pump wear (leading to hard starting or misfires), EGR valve clogging, and intake carbon buildup. Other complaints include ignition coil failures and occasional fuel injector deposits. These are well-documented in Mercedes-Benz service bulletins.
This 6.0L V12 was used in several flagship luxury models during the 2012–2019 period. It powered the S-Class (W222 S600), CLS-Class (C217 CLS63 AMG), SL-Class (R231 SL63 AMG), and GLS-Class (X166 GLS63 AMG). It replaced the M285 and was succeeded by electrified V8s in most applications.
Yes, but with limitations. As a naturally aspirated engine, power gains from ECU remapping are modest (+30–60 kW). More significant increases require forced induction (supercharger/turbo) or displacement upgrades. Tuning should preserve factory valve timing and fuel delivery to avoid reliability issues.
High for a V12. In an S600 (W222), typical consumption is ~18.0 L/100km (city) and ~10.5 L/100km (highway), or about 15 mpg UK combined. Real-world figures depend on driving style, but expect 14–18 mpg (UK) on mixed roads. Premium fuel (98 RON) is required for optimal performance.
Yes. The M279 series is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, causing catastrophic engine damage. Chain maintenance and timely fuel pump replacement are critical to prevent this.
Mercedes specifies a 5W-30 synthetic oil meeting MB 229.51 specification. Always use a high-quality low-SAPS oil designed for direct-injection petrol engines and change it every 15,000 km or annually to ensure proper VVT and fuel system lubrication.
Comprehensive technical documentation and regulatory references
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MERCEDES-BENZ Official Site
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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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