Mercedes-Benz GLA 200d X156 — Reliability

X156 SUV Compact SUV 2014–2020 1 engine

Reliability Summary

Engine OM651 (late) — 72/100 ACCEPTABLE
Known Issues 2

Engine in this model

ACCEPTABLE 72

OM651 (late)

2.1L Diesel I4

Post-2014: updated injectors + pump. Much improved. Highway excellent.

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Known Issues Across All Engines

Issue Engine Severity Onset
DPF blockage — city driving concern OM651 (late) high 60,000 km – 120,000 km
EGR valve fouling (post-2014) OM651 (late) moderate 80,000 km – 150,000 km