I'll tell you which one is best 🏆️

Mercedes-Benz diesel engines have established a legendary reputation for durability and over-engineered simplicity. The journey began in earnest with the OM621 found in the Ponton and Fintail models, providing modest power but exceptional longevity. The introduction of the OM615 and OM616 four-cylinder engines in the 1960s and 70s powered the iconic W115 and W123 chassis. These powerplants utilized indirect injection and glow plugs, requiring a manual start procedure that became a hallmark of the brand. A significant turning point occurred in the mid-1970s with the OM617. This five-cylinder engine became the gold standard for reliability. In 1978, Mercedes-Benz pioneered the use of turbocharging in passenger diesel cars with the 300SD, proving that diesel efficiency could coexist with highway-capable performance. By the mid-1980s, the OM60x series arrived, featuring overhead camshafts and hydraulic lifters for smoother, quieter operation. These engines powered the W124 and W201 generations until 1987 and beyond. Throughout this thirty-year span, these engines frequently eclipsed 300,000 miles, cementing the diesel Mercedes as the ultimate high-mileage marathoner. #diesel #mercedes #300td