Mercedes-Benz C-Class W204 — Reliability

W204 2009–2011 1 engine

Reliability Summary

Engine M272 — 65/100 CAUTION
Known Issues 6

Engine in this model

CAUTION 65

M272

V6 NA 2.5-3.5L

Smooth, refined V6 (2.5, 3.0, 3.5 and 3.5 CGI) in the C, E, CLK, CLS, SLK, SL, ML, R and GLK of 2004...

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Known Issues Across All Engines

Issue Engine Severity Onset
Balance-shaft sprocket wear (early engines, US settlement) M272 critical 60,000 km – 140,000 km
Intake manifold flap linkage breakage M272 moderate —
High-pressure fuel pump failure (CGI direct injection only) M272 moderate —
Map-controlled thermostat failure M272 minor —
Camshaft adjuster magnet oil leak (oil wicking into the harness) M272 minor —
Spark plugs + ignition coils M272 minor 80,000 km – 150,000 km