Mercedes-Benz C-Class W205 — Reliability

W205 2014–2021 1 engine

Reliability Summary

Engine M276 — 83/100 BUY
Known Issues 3

Engine in this model

BUY 83

M276

V6 3.0/3.5L

The V6 that replaced the troubled M272: a 3.5 without turbos and a 3.0 or 3.5 biturbo, in the C, E, ...

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Known Issues Across All Engines

Issue Engine Severity Onset
Secondary timing-chain tensioners drain — cold-start rattle, chain stretch (early engines) M276 moderate —
Valve cover / cam cover oil leaks M276 minor 100,000 km – 200,000 km
Spark plugs + ignition coils M276 minor 80,000 km – 150,000 km