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V12 Engine Mercedes : Specs, Reliability & Common Problems
The Mercedes M279 engine is a 6.0 L twin-turbocharged V12, one of the most powerful and refined engines ever built by Mercedes-Benz. Reserved for luxury flagships such as the Mercedes S-Class, Maybach S680, and AMG S65, it delivers a blend of smooth power, comfort, and exclusivity.
With 621 hp and 738 lb-ft of torque, the M279 offers both thrilling acceleration and serene long-distance cruising. Like all complex engines, it has maintenance demands and a few common issues. This guide covers the M279’s specs, reliability, oil capacity, common problems, and models equipped.
Explore the full family of Mercedes powerplants in our Mercedes Engine Types Hub.
M279 Engine Specifications
| Specification | Details |
|---|---|
| Displacement | 6.0 L (5,980 cc) |
| Layout | V12, twin-turbocharged |
| Power Output | ~621 hp |
| Torque | 1,000 Nm (738 lb-ft) |
| Valvetrain | DOHC, 3 valves per cylinder |
| Oil Capacity | ~9 L (9.5 quarts) |
| Applications | Maybach S600/S680, Mercedes-Benz S65 AMG |
M279 Reliability
The M279 is regarded as reliable for a high-performance engine when properly maintained.
Reliability factors:
- – Build quality: aluminum block, forged components, and advanced turbo design.
- – Maintenance needs: oil changes, turbo inspections, and cooling system care are essential.
- – Longevity: many owners report strong reliability with regular service.
Common Problems with the M279
While robust, the M279 V12 has some known issues:
| Problem | Symptoms | Fix / Notes |
|---|---|---|
| Oil leaks (gaskets/seals) | Oil smell, drips under engine | Replace seals & gaskets |
| Turbocharger wear | Power loss, whistling noise | Inspect turbos; rebuild/replace if worn |
| Electrical faults | Warning lights, misfires | Diagnose ECU/sensor wiring |
| High maintenance costs | Expensive servicing vs. smaller engines | Plan higher service budget |
Related read: How To Fix Engine Misfire – M279 Case Study
M279 Engine Oil Capacity
- – Capacity: ~9 liters (9.5 quarts) including filter
- – Recommended oil: Mercedes-approved high-performance synthetic (e.g., 0W-40 MB Spec 229.5)
- – Interval: every 10,000 miles (or shorter if driven hard)
Mercedes Models with the M279
The M279 was used in Mercedes’ most prestigious flagships:
- Mercedes-Maybach S600 – ultra-luxury sedan with V12 smoothness.
- Mercedes-Benz S65 AMG – combines refinement with AMG performance.
- Mercedes-Maybach S680 – modern evolution of the V12 Maybach.
Mercedes V12 Engines – A Legacy
Mercedes has a long history of V12 engines:
| Engine | Years | Specs | Key Models |
|---|---|---|---|
| M120 | 1991–1999 | 6.0L NA V12 | S-Class W140, CL C140 |
| M275 | 2003–2014 | 6.0L twin-turbo V12 | S65 AMG, CL65 AMG |
| M279 | 2011–2022 | 6.0L twin-turbo V12 | Maybach S600/S680, S65 AMG |
Key traits of Mercedes V12 engines:
- Smooth operation from perfect balance.
- High power and torque for effortless acceleration.
- Luxury application in S-Class and Maybach models.
FAQs : Mercedes M279 Engine
Q1: Is the Mercedes M279 reliable?
Yes, with proper maintenance. Turbo wear and oil leaks are possible, but the engine is built to last.
Q2: How much oil does the M279 hold?
Around 9 liters (9.5 quarts) with filter.
Q3: What cars use the M279?
Mercedes-Maybach S600/S680 and Mercedes-Benz S65 AMG.
Q4: What are the most common M279 problems?
Oil leaks, turbocharger wear, and high running costs.
Q5: Does Mercedes still make V12 engines?
Yes, the M279 powered Maybach until 2022. It continues the V12 legacy that began with the M120.
Conclusion
The Mercedes M279 V12 represents the pinnacle of luxury and power. With its smooth twin-turbo performance, refinement, and exclusivity, it remains one of the most iconic Mercedes engines.
While maintenance costs are high and some issues (oil leaks, turbo wear) may arise, proper care ensures reliability and long-term enjoyment. For enthusiasts and luxury buyers, the M279 embodies the spirit of the ultimate Mercedes-Benz experience.
Explore more engines in our Mercedes Engine Types Hub.
Author
Written by Mercedes Expert
With years of hands-on experience diagnosing and repairing Mercedes-Benz systems, he brings technical depth and practical case studies to help car owners, technicians, and enthusiasts troubleshoot complex automotive issues. His work focuses on clear repair guides, OEM-level procedures, and knowledge-sharing to empower both professionals and drivers.
Last Updated: September 2025
