Common Mercedes-Benz A-Class faults
These are the failure points Carleeta’s known-faults engine checks for on every Mercedes-Benz A-Class report — curated from owner and workshop reports, not guesswork. Use them as an inspection checklist and a negotiation lever, not a certainty: an unlisted fault doesn’t mean a clean car, and a listed one doesn’t mean this exact car has it.
Faults on every Mercedes-Benz A-Class
- Major
Mercedes 7G-DCT dual-clutch gearboxes are commonly reported for jerky low-speed shifts, hesitation and mechatronic/clutch wear. Confirm gearbox service and test crawl-speed manoeuvres from cold.
Typical repair leverage: £300–£500
- Medium
Front suspension bush and top-mount wear producing knocks is commonly reported. Listen over bumps and check tyre wear.
Typical repair leverage: £150–£250
- Medium
Infotainment, sensors and electrical warning lights are commonly reported. Run a diagnostic scan and test all electronics.
Typical repair leverage: £150–£250
- Minor
Coolant weeps and minor oil leaks are commonly reported. Check for staining and coolant loss.
Typical repair leverage: £60–£100
A-Class petrol
Additional faults specific to this engine/derivative, on top of the faults above.
- Medium
Older A-Class petrols are commonly reported for timing-chain wear — listen for a cold-start rattle and confirm oil-service history.
Typical repair leverage: £150–£250
Buying a Mercedes-Benz A-Class?
Paste its reg and Carleeta checks it against faults like these, plus provenance, MOT history and a max-bid number — free.
Check a specific Mercedes-Benz A-Class — free teaserCosts are indicative repair-leverage ranges by fault severity, not quoted prices for this specific fault — always get a written quote. This is guidance, not a substitute for a professional inspection.