Mercedes-Benz GLC 220d X253 — Reliability

X253 SUV Mid SUV 2015–2022 2 engines

Reliability Summary

Best engine OM654 — 85/100 BEST
Worst engine OM651 (late) — 72/100 ACCEPTABLE
Average reliability 78/100

Engine Comparison

Engine Reliability Score Verdict Known Issues
OM654
2.0L Diesel I4 		85/100 BEST DPF — better than older MB diesels but still diesel +1
OM651 (late)
2.1L Diesel I4 		72/100 ACCEPTABLE DPF blockage — city driving concern +1

Engines in this model

BEST 85

OM654

2.0L Diesel I4

Best modern MB diesel. Aluminium block, low friction. Long-distance champion.

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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 — better than older MB diesels but still diesel OM654 minor 80,000 km – 150,000 km
Minor EGR fouling (best-in-class but not immune) OM654 minor 100,000 km – 180,000 km
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

FAQ

Is the Mercedes-Benz GLC 220d reliable?

The Mercedes-Benz GLC 220d has 2 engine options with reliability scores ranging from 72/100 (ACCEPTABLE) to 85/100 (BEST). Average reliability: 78/100.

Which Mercedes-Benz GLC 220d engine is most reliable?

The OM654 is the most reliable engine in the Mercedes-Benz GLC 220d, scoring 85/100 (BEST).

What problems does the Mercedes-Benz GLC 220d have?

Across all engine variants, the Mercedes-Benz GLC 220d has 4 known issues. The most common are related to DPF — better than older MB diesels but still diesel, Minor EGR fouling (best-in-class but not immune), DPF blockage — city driving concern.