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Is the Mercedes 300D a good engine?

Is the Mercedes 300D a good engine? Are mercedes 300d engines reliable? Yes, particularly the om617 engine. With regular oil changes and basic maintenance, these engines routinely surpass 300,000–500,000 miles. Reliability drops if neglected—especially regarding glow plugs, vacuum lines, and coolant system upkeep. Expert tip: the 300tdi is widely considered the most reliable engine land

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