TransmissionMedium
Dual clutch judder in slow traffic
DCT clutch pack / mechatronic work£900–£3,200
Inspect · Pull away from cold repeatedly
2019–2025 Mercedes-Benz B-Class · common fault repair costs
What the known faults on this Mercedes-Benz B-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
- £2,300
- Worst case, everything
- £12,100
The single priciest documented job on the 2019–2025 Mercedes-Benz B-Class is dct clutch pack / mechatronic work at £900–£3,200. Few cars need every repair listed here · treat £3,220–£12,100 as the full exposure if one arrived with all of them.
Cost per fault
Engine (Petrol)Medium
Coolant loss and sweet smell under the bonnet
Head gasket / cooling system repair£900–£2,600
Inspect · Shine a torch down the right side of the engine block (gearbox side) on 1.3L M282 engines. Look for pink or red crusty residue indicating a leaking plastic thermostat housing.
Emissions (Diesel)High
Engine management light and non-start countdown
Injector set replacement & coding£500–£1,600
Inspect · Turn the ignition on and scroll through the instrument cluster messages. Look for 'Refill AdBlue' warnings or a mileage countdown, which often indicates crystallized AdBlue injectors rather than an empty tank.
ElectricalMedium
MBUX screen freezes and reboots
Infotainment repair or software fix£120–£1,200
Inspect · Cycle every screen and voice function
SuspensionLow
Bush wear on larger wheel options
Suspension refresh (per axle)£250–£1,100
Inspect · Listen for knocks over rough roads
BrakesMedium
Rear disc corrosion on low mileage cars
Brakes (discs, pads, caliper)£200–£800
Inspect · Inspect rear discs for pitting
InteriorMedium
Grinding noise or binding from panoramic sunroof
Water-ingress trace & seal£150–£800
Inspect · Operate the sunroof switch to fully open and close the glass. Listen for crunching noises and visually inspect the exposed guide rails for dry, scored metal or snapped plastic wind deflectors.
ElectricalMedium
Active Brake Assist functions limited warning
Brakes (discs, pads, caliper)£200–£800
Inspect · Start the engine and check the dash for collision prevention warnings. Inspect the flat Mercedes star badge on the front grille for water condensation behind the plastic or heavy stone chips disrupting the radar.
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 B-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.