TransmissionHigh
Dual clutch judder and hesitation from standstill
- Typically appears
- 60,000+ miles
- What to inspect
- Pull away repeatedly from cold in traffic
- Typical repair
- DCT clutch pack / mechatronic work · £900–£3,200
Is the 2019–2025 Mercedes-Benz CLA reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
5.2/ 10
MixedOn our documented-fault scoring the Mercedes-Benz CLA rates 5.2 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 transmission, electrical and suspension. 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
- 4
- Low
- 2
Weak points cluster around transmission, electrical, suspension, body.
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Build the inspection planThe faults that decide it
Emissions (Diesel)High
Engine management light illuminated due to AdBlue injector crystallisation or failing NOx sensors.
- Typically appears
- 40,000-70,000 miles
- What to inspect
- Start the engine from cold and check the dashboard for the EML or an 'AdBlue system fault' countdown message. Listen for a lumpy idle during the first 10 seconds.
- Typical repair
- Injector set replacement & coding · £500–£1,600
ElectricalMedium
MBUX screen freezes and reboot loops
- Typically appears
- Age-related
- What to inspect
- Cycle navigation, audio and voice control
- Typical repair
- Infotainment repair or software fix · £120–£1,200
SuspensionMedium
Front bush wear and knocking on lowered AMG Line cars
- Typically appears
- 50,000+ miles
- What to inspect
- Drive over speed humps and listen at the front
- Typical repair
- Suspension refresh (per axle) · £250–£1,100
Engine (1.3L Petrol)Medium
Oil seepage down the front of the engine block from the timing chain cover.
- Typically appears
- 30,000-50,000 miles
- What to inspect
- Shine a torch down the right side of the engine bay past the alternator to check for fresh oil misting or weeping on the block.
- Typical repair
- Timing chain, tensioner & guides · £900–£2,400
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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