The Mercedes-Benz M113 engine stands out as a paragon of durability and robust design in the automotive world. Often described as the M112 engine with two additional cylinders, this V8 powerplant has garnered a reputation for longevity that few engines can match. Owners and mechanics alike consistently praise its resilience, even in vehicles showing signs of age and neglect in other areas.
The M113’s robust nature becomes strikingly evident when considering real-world examples. It’s not uncommon to encounter Mercedes-Benz models, such as the W220 S-Class, equipped with the M113, where the chassis and ancillary components may show wear and tear, yet the engine continues to perform admirably. Stories abound of S430 and S500 models exceeding 300,000 miles while still running strong, a clear indication of the M113’s inherent strength. This remarkable durability leaves many wondering why Mercedes-Benz transitioned away from this engine in favor of the M272 and M273 series. Indeed, to encounter a truly broken M113 engine often suggests significant mishandling or extreme neglect.
Adding to the powertrain’s reliability is the frequently paired 722.6 five-speed automatic transmission, especially in 4Matic W220 models. This transmission is known for its own robust construction, creating a drivetrain combination that is exceptionally dependable. While later two-wheel-drive models sometimes featured the 722.9 seven-speed transmission, early versions of the 7-speed had valve body issues, making the 722.6 a preferred choice for ultimate reliability.
Turning to the W163 ML-Class SUV, the engine bay layout further highlights the M113’s user-friendly design. Owners of the ML320 (V6) and ML500 (V8) models often note the ample workspace in the engine bay, facilitating easier maintenance and repairs. While the ML500, housing the larger V8, understandably presents slightly less room compared to the V6 ML320, the difference is marginal. In practical terms, this might mean that tasks achievable on an ML320 without removing the radiator fan might require fan removal on the ML500 to gain sufficient access.
In conclusion, the Mercedes-Benz M113 engine has solidified its place as a legend in automotive engineering, celebrated for its exceptional durability and longevity. Its robust design, combined with reliable transmission pairings, has made it a favorite among Mercedes-Benz enthusiasts and a benchmark for engine reliability.
