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Mercedes-AMG M177 4.0 L Biturbo V8 (2015–Present) : Overview, Common Problems & Maintenance
Developed and assembled in Affalterbach, the M177 is one of AMG’s high-performance V8 engines used in models like E63, S63, C63, GLC 63, CLS 63 or G-Class AMG plus Aston Martin DB11 & Vantage applications. Featuring twin-scroll turbos, dry-sump lubrication (in S/E/GT), and optional 48V EQ Boost, it’s praised for its power and durability
But beyond the speed and power, there’s a lot to know about the M177’s long-term reliability and known issues. In this guide, we’ll break down its full performance specs, common problems owners should watch for, and what makes this engine one of the most exciting V8s Mercedes has ever built.
Introduction to the M177 Engine
The Mercedes M177 is a 4.0-liter V8 twin-turbocharged engine that serves as the beating heart of many high-performance AMG models. This engine is designed to deliver exceptional power, torque, and a thrilling driving experience, all while maintaining the luxury and refinement that Mercedes-Benz is known for.
The M177 is closely related to the M178 engine, which powers the AMG GT models, but it’s specifically engineered for use in AMG sedans, coupes, and SUVs.
Engine Applications & Specs
| Model | Power (kW) | Torque (Nm) | Lubrication | Years |
|---|---|---|---|---|
| C 63 (W205) | ~350 kW | ~650 Nm | Wet sump | 2015–2021 |
| E 63 S (W213) | ~450 kW | ~850 Nm | Wet sump | 2017–2022 |
| CLS/SL/E Coupé/S 63+ | 375–450 kW | 700–850 Nm | Wet/dry sump | 2015–2022 |
| AMG GT & Aston Martin | 340–375 kW | 600–700 Nm | Various | 2015–2023 |
M177 engine reliability
The M177 is generally regarded as a reliable powerhouse, thanks to Mercedes-AMG’s rigorous engineering and testing. However, like any high-performance engine, its reliability heavily depends on proper maintenance and care.
Regular oil changes, using the correct fuel, and timely servicing are crucial to ensuring the engine’s longevity. Owners who stick to the recommended maintenance schedule typically experience fewer issues and enjoy a more dependable performance.
How Much Horsepower Does the M177 Have?
The M177’s power output varies across different models:
- – Base Versions: Approximately 469 horsepower.
- – Mid-Range Versions: Around 503 horsepower, found in models like the AMG C63 S.
- – Top-Spec Versions: Up to 630 horsepower, as seen in the AMG GT 63 S 4-Door Coupe.
This range of power allows the M177 to cater to different driving preferences, from powerful yet manageable performance to exhilarating, track-ready capability.
M177 engine problems & Diagnostic Fixes
While the M177 is robust, there are a few common issues that owners should be aware of:
| Issue | Symptoms | Diagnosis & Fix |
|---|---|---|
| Oil leaks | Puddles under engine, burning odor | Valve cover, oil pan, oil cooler seals wear early inspect and replace with OEM parts |
| Intake carbon buildup | Rough idle & reduced mpg | Clean with walnut blasting ~30k–50k mi |
| Timing chain stretch | Rattle on cold start | Inspect chain/tensioners, replace if code or noise |
| HPFP failure | Misfires, poor start, CEL | Inspect & replace high-pressure fuel pump |
| Turbo wear | Whistle, low boost, smoke | Replace turbochargers; ensure good oil service |
| Cooling issues | Overheating, leaks | Maintain water pump, thermostats, radiator integrity |
| Ignition coil failure | Misfire, cylinders drop | Replace coils use updated A1779060206 type |
Learn about One M177’s Issues in the next link.
Engine Misfire and Engine Light On : Find Solution Here
Limp Mode Car: Solving a Low Power Issue
Maintenance & Prevention Checklist
- – Regular oil changes (5k–7.5k miles intervals)
- – Check for oil leaks replace valve cover/oil pan gaskets as needed
- – Clean intake valves via walnut blasting every 30–50k mi
- – Inspect timing chain at early noise or high mileage
- – Replace failing HPFP and coil packs early
- – Ensure turbo health with quality oil and filter maintenance
- – Maintain cooling system: coolant, belts, and hoses
M177 Engine Oil Capacity
The M177 has an oil capacity of about 9 liters (9.5 quarts). Using high-quality, AMG-approved synthetic oil is essential to keep the engine running smoothly and to protect it from the stresses of high-performance driving. Regular oil changes, typically every 10,000 miles or as recommended by Mercedes-Benz, are crucial to maintaining engine health.
Which Mercedes Models Have the M177 Engine?
The M177 powers a variety of high-performance AMG models, including:
Mercedes-AMG C63 and C63 S (W205)
Mercedes-AMG E63 and E63 S (W213)
Mercedes-AMG GT 63 and GT 63 S 4-Door Coupe (X290)
These vehicles are celebrated for their blend of luxury, performance, and the distinctive V8 soundtrack provided by the M177.
Is the M177 Engine Good?
The M177 is widely considered one of the best high-performance engines in its class. It offers a unique combination of power, reliability, and the refined engineering that Mercedes-AMG is famous for.
Owners and reviewers alike praise the M177 for its responsiveness, durability, and the exhilarating driving experience it provides. However, as with any performance engine, proper care and maintenance are vital to keeping it in top condition.
Conclusion
The Mercedes M177 is a marvel of modern automotive engineering, offering unparalleled power and performance in a range of AMG models. Whether you’re considering a vehicle with the M177 or you’re simply curious about its capabilities,
this guide has provided the essential details you need to know. With proper care, the M177 will continue to deliver the thrilling performance that AMG vehicles are known for, making it a fantastic choice for those seeking a powerful yet refined driving experience.
Frequently Asked Questions
Is the M177 engine reliable?
Yes, it’s highly reliable for a high-output performance engine, though oil leaks, carbon buildup, and turbo maintenance are expected.
How often should I clean the intake valves?
Every ~30,000–50,000 miles to avoid carbon buildup and maintain performance.
What’s the cause of misfires?
Typically ignition coil failure. Use the updated A1779060206 coil to resolve misfires reliably.
Are turbo failures common?
Not particularly. Failures usually follow poor oil maintenance. With proper servicing, turbos tend to be durable.
