Mercedes-Benz C-Class W204 — Reliability

W204 2011–2014 1 engine

Reliability Summary

Engine OM642 — 65/100 CAUTION
Known Issues 5

Engine in this model

CAUTION 65

OM642

3.0L V6 Diesel

Smooth, strong 3.0 V6 diesel that goes 300,000+ km when maintained - but four expensive weak spots: ...

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Known Issues Across All Engines

Issue Engine Severity Onset
Crankshaft main bearing failure (mainly up to MY 2009) OM642 critical 150,000 km – 200,000 km
Valley oil cooler seal failure OM642 high —
Swirl flap / intake port shut-off (EKAS) failure OM642 high —
EGR valve and cooler sooting OM642 moderate —
BlueTEC NOx / emissions software recall OM642 moderate 60,000 km – ∞