TransmissionHigh
7G-DCT dual-clutch jerkiness and clutch wear
DCT clutch pack / mechatronic work£900–£3,200
Inspect · Crawl in traffic and feel for shunting
2012–2025 Mercedes-Benz A-Class · common fault repair costs
What the known faults on this Mercedes-Benz A-Class typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
Cost at a glance
- Most expensive fault
- £900–£3,200
- Top three risks, from
- £2,050
- Worst case, everything
- £12,800
The single priciest documented job on the 2012–2025 Mercedes-Benz A-Class is dct clutch pack / mechatronic work at £900–£3,200. Few cars need every repair listed here · treat £3,040–£12,800 as the full exposure if one arrived with all of them.
Cost per fault
EngineMedium
Timing chain wear on older petrols and oil leaks
Timing chain, tensioner & guides£900–£2,400
Inspect · Cold-start listen and underside inspection
BodyworkMedium
Water ingress into the boot causing damp smells and potential rear SAM unit electrical issues.
Body & corrosion repair£250–£1,800
Inspect · Lift the boot floor carpet and inspect the spare wheel well and tool tray for standing water, rust, or heavy condensation.
ElectricalMedium
MBUX screen failures and reversing camera dropouts
Infotainment repair or software fix£120–£1,200
Inspect · Test MBUX, voice control and camera
SuspensionLow
Front bushes and knocking over broken roads
Suspension refresh (per axle)£250–£1,100
Inspect · Listen over speed bumps
ElectricalLow
Fuel filler flap actuator seizes internally, preventing the flap from opening at the petrol station.
Suspension refresh (per axle)£250–£1,100
Inspect · Lock and unlock the car using the key fob, then press the fuel filler flap to ensure it springs open smoothly without needing the emergency release.
SteeringLow
Clicking or plastic creaking noises from the steering column clock spring during low-speed manoeuvres.
Suspension refresh (per axle)£250–£1,100
Inspect · With the engine running and the car stationary, turn the steering wheel lock-to-lock and listen closely for a plastic clicking noise directly behind the airbag.
EmissionsHigh
NOx sensor failure on diesel models triggering the EML and an AdBlue countdown restriction.
Electrical diagnosis & module repair£120–£900
Inspect · Start the engine and cycle through the instrument cluster messages to check for an illuminated EML or an active AdBlue range restriction warning.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Inspecting a Mercedes-Benz A-Class this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.