GLC X254
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Which Mercedes Benz GLC X254 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Mercedes Benz GLC X254 engine is the most reliable?
A180d / A200d / A220d (OM654q 2.0) — Maint. Sensitive verdict. The A-Class diesels use the modern 2.0 OM654 (in its compact 'q' form — shared with the GLB/GLC and C/E-Class) — a refined, strong and genuinely economical unit and the engine to buy if you do the miles. It's a much-improved design over the older OM651 (no rear-chain-rattle reputation), with the standard modern-diesel cautions: DPF on short trips, EGR, AdBlue/SCR, and injector attention at high miles. Paired with the 8G/7G-DCT. A motorway-driven, serviced car is a dependable long-hauler — the 220d is the pick. Buy on oil, DPF and AdBlue history.
Which Mercedes Benz GLC X254 engines should you avoid?
None of the Mercedes Benz GLC X254 engines listed are rated "Problematic" or "Avoid" — but always check the service history before buying.
What are the most common Mercedes Benz GLC X254 problems?
The most commonly reported problems across all Mercedes Benz GLC X254 generations and engines: DPF / EGR / AdBlue, Injector / DCT (high miles), 48V ISG mild-hybrid system, Intake carbon / turbo (newer design).