Mercedes-Benz GLK X204 — Reliability

X204 2008–2015 1 engine

Reliability Summary

Engine OM651 (early) — 38/100 AVOID
Known Issues 3

Engine in this model

AVOID 38

OM651 (early)

2.1L Diesel I4

Pre-2014: injectors, timing chain, DPF. Hard to work on.

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Known Issues Across All Engines

Issue Engine Severity Onset
Piezoelectric injector failure (pre-2014) OM651 (early) critical 60,000 km – 130,000 km
Timing chain stretch (pre-2014) OM651 (early) critical 80,000 km – 150,000 km
DPF + EGR fouling (city use) OM651 (early) high 60,000 km – 120,000 km