The Most Reliable Mercedes Engine, Ranked

Choose the engine you think is the most reliable!

Author: Gregor Krambs
Updated on Jun 20, 2024 07:23
When choosing a car, the engine's reliability often tops the list of considerations, particularly for enthusiasts of high-end vehicles like Mercedes. By evaluating which engines deliver consistent performance and longevity, potential buyers can make more informed decisions. This also helps current owners know about the resilience of their vehicle's heart. This dynamic list reflects the collective experiences and opinions of Mercedes owners worldwide. Every vote helps paint a clearer picture of which engines stand out for their dependability. As you interact with the list, remember that each vote can significantly influence future buyers and current enthusiasts alike in their automotive journey.

What Is the Most Reliable Mercedes Engine?

  1. 1


    The OM617 is a turbo-diesel engine known for its durability and longevity, capable of reaching over 1 million miles with proper maintenance.
    • Production Years: 1974-1985
    • Configuration: Inline-5
  2. 2


    The M113 is a naturally aspirated V8 engine praised for its reliability, used in a wide range of Mercedes models from the late 1990s to the mid-2000s.
    • Production Years: 1997-2011
    • Configuration: V8
  3. 3


    The M104 is an inline-6 gasoline engine praised for its performance and reliability, serving as a successor to the M103 engine.
    • Production Years: 1989-1999
    • Configuration: Inline-6
  4. 4


    The OM642 is a V6 diesel engine that has proven to be reliable with proper maintenance, used in many models since the mid-2000s.
    • Production Years: 2005-present
    • Configuration: V6
  5. 5


    The M278 is a twin-turbo V8 engine known for its power and relative reliability in luxury and performance models.
    • Production Years: 2010-present
    • Configuration: V8
  6. 6


    The OM605 is a 5-cylinder diesel engine known for its durability and efficiency, popular in the 1990s.
    • Production Years: 1993-2001
    • Configuration: Inline-5
  7. 7


    The M272 is a V6 engine known for its balance of power and reliability, found in many Mercedes vehicles from the mid-2000s.
    • Production Years: 2004-2015
    • Configuration: V6
  8. 8


    The OM606 is a 6-cylinder diesel engine known for its robustness and has been a favorite among enthusiasts for engine swaps.
    • Production Years: 1993-2001
    • Configuration: Inline-6
  9. 9


    The M111 is a 4-cylinder engine noted for its reliability and was a staple in many entry-level Mercedes models throughout the 1990s.
    • Production Years: 1992-2003
    • Configuration: Inline-4
  10. 10


    The OM602 is a durable diesel engine renowned for its reliability and efficiency, widely used in the 1980s and 1990s.
    • Production Years: 1985-2002
    • Configuration: Inline-5

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About this ranking

This is a community-based ranking of the most reliable Mercedes engine. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or engine is missing, feel free to help improve the ranking!


  • 102 votes
  • 10 ranked items

Movers & Shakers

Voting Rules

A participant may cast an up or down vote for each engine once every 24 hours. The rank of each engine is then calculated from the weighted sum of all up and down votes.

Additional Information

More about the Most Reliable Mercedes Engine

Rank #1 for the most reliable Mercedes engine: OM617 (Source)
Mercedes-Benz has a long history of engineering excellence. Their engines are known for reliability and performance. Over the years, Mercedes has refined its designs to ensure longevity and efficiency. The key to their success lies in meticulous craftsmanship and innovative technology.

Mercedes engines undergo rigorous testing. Engineers test them under extreme conditions to ensure durability. These tests simulate various driving environments, from city streets to rough terrains. This thorough process helps identify and fix potential issues before production.

High-quality materials play a crucial role. Mercedes uses premium metals and alloys in their engines. These materials resist wear and tear, extending the engine's life. The precision in manufacturing also ensures each part fits perfectly, reducing strain and enhancing performance.

Maintenance is another factor. Mercedes provides clear guidelines for engine care. Regular oil changes, timely inspections, and using genuine parts are essential. Following these guidelines helps maintain the engine's reliability over time.

Innovation is at the core of Mercedes engines. They incorporate advanced technologies to improve efficiency and power. Features like direct fuel injection and turbocharging enhance performance while reducing fuel consumption. These technologies also contribute to lower emissions, aligning with environmental standards.

Mercedes also focuses on driver experience. Their engines are designed to deliver smooth and responsive power. This balance of performance and comfort is a hallmark of the brand. Whether on a daily commute or a long journey, Mercedes engines provide a dependable and enjoyable drive.

Customer feedback influences engine development. Mercedes listens to drivers and uses their insights to improve. This customer-centric approach ensures that each new engine meets the needs and expectations of users.

Continuous improvement is a Mercedes tradition. Engineers constantly seek ways to enhance engine performance. They explore new materials, technologies, and methods. This commitment to progress keeps Mercedes at the forefront of automotive engineering.

Mercedes engines also benefit from a robust support network. Authorized service centers worldwide offer expert maintenance and repairs. This network ensures that help is available wherever you are, adding to the reliability of Mercedes engines.

In conclusion, the reliability of Mercedes engines stems from a blend of rigorous testing, high-quality materials, advanced technologies, and continuous improvement. Regular maintenance and a strong support network further enhance their dependability. This combination of factors makes Mercedes engines a trusted choice for drivers seeking performance and longevity.

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