A-Class W169
1 generation · Select a generation to see engines
Which Mercedes Benz A-Class W169 engine is the most reliable? See common problems, reviews and reliability verdicts across generations and engines.
Frequently asked questions
Which Mercedes Benz A-Class W169 engine is the most reliable?
1.5 / 1.7 petrol (M266) — Maint. Sensitive verdict. The M266 petrols — simple and reliable, with the 1.7 (116hp) the best balance of power and dependability (the 1.5 is underpowered). Main niggles are ignition coils, spark plugs and the odd injector/sensor causing misfire/rough idle. Prefer a 2008+ car (early faults ironed out).
Which Mercedes Benz A-Class W169 engines should you avoid?
None of the Mercedes Benz A-Class W169 engines listed are rated "Problematic" or "Avoid" — but always check the service history before buying.
What are the most common Mercedes Benz A-Class W169 problems?
The most commonly reported problems across all Mercedes Benz A-Class W169 generations and engines: Oil leaks, Ignition coil / plug / injector faults, Coil / plug / injector faults, DPF clogging (short trips), Injector / EGR wear.