TransmissionHigh
7G-DCT dual-clutch jerkiness and clutch wear
- Typically appears
- 70,000+ miles
- What to inspect
- Crawl in traffic and feel for shunting
- Typical repair
- DCT clutch pack / mechatronic work · £900–£3,200
Is the 2012–2025 Mercedes-Benz A-Class reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
5.5/ 10
MixedOn our documented-fault scoring the Mercedes-Benz A-Class rates 5.5 out of 10 · mixed. We hold 8 known faults for it and 2 are rated high severity, so the risk is real but contained. The weak points cluster around electrical, transmission and engine. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Negotiate · budget for the known faults
What the score is built from
- Critical
- 0
- High
- 2
- Medium
- 3
- Low
- 3
Weak points cluster around electrical, transmission, engine, suspension.
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Check this carThe faults that decide it
EmissionsHigh
NOx sensor failure on diesel models triggering the EML and an AdBlue countdown restriction.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Start the engine and cycle through the instrument cluster messages to check for an illuminated EML or an active AdBlue range restriction warning.
- Typical repair
- Electrical diagnosis & module repair · £120–£900
EngineMedium
Timing chain wear on older petrols and oil leaks
- Typically appears
- 90,000+ miles
- What to inspect
- Cold-start listen and underside inspection
- Typical repair
- Timing chain, tensioner & guides · £900–£2,400
ElectricalMedium
MBUX screen failures and reversing camera dropouts
- Typically appears
- Age-related
- What to inspect
- Test MBUX, voice control and camera
- Typical repair
- Infotainment repair or software fix · £120–£1,200
BodyworkMedium
Water ingress into the boot causing damp smells and potential rear SAM unit electrical issues.
- Typically appears
- 40,000-80,000 miles
- What to inspect
- Lift the boot floor carpet and inspect the spare wheel well and tool tray for standing water, rust, or heavy condensation.
- Typical repair
- Body & corrosion repair · £250–£1,800
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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