I think the E350 motor had its own set of issues, the M112 seems to be one of the most durable to date other than the minor issue with balancers which was a supplier defect.

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'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
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