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E/W214: Engine reliability: E350 vs E450

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Old 08-30-2024, 07:48 PM
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Engine reliability: E350 vs E450

How does the reliability compare? Saw some complaints that metal pieces damaged the turbo in I4, but that shouldn't be typical.
Old 08-30-2024, 07:53 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by liexpress
How does the reliability compare? Saw some complaints that metal pieces damaged the turbo in I4, but that shouldn't be typical.
Just strictly speaking from reliability perspective, the M256 in the 450 will be more reliable, it was on the market for longer than the M254 in the 350. Then there is also the fact that the six cylinder doesn't have to work as hard as the four cylinder to complete the same task.
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Old Yesterday, 08:57 PM
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Originally Posted by W205C43PFL
Just strictly speaking from reliability perspective, the M256 in the 450 will be more reliable, it was on the market for longer than the M254 in the 350. Then there is also the fact that the six cylinder doesn't have to work as hard as the four cylinder to complete the same task.
Thanks. Just picked up a E450.
Old Yesterday, 10:02 PM
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by liexpress
Thanks. Just picked up a E450.
Congrats, good choice : )
Old Yesterday, 10:19 PM
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M254 is a troubled engine (cylinder head failures) and it is descended from a long line of troubled MB four-bangers. Looks like you made the right choice to stay away from the M254.

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