Mercedes-Benz B-Class MOT Results

Registered in 2012
74.9% pass rate
from 6,066 tests in 2021
(15% better than other 2012 cars)
Pass rate by mileage
Failure rates by item

Here you can drill down into the failure rates for each item on the test. We've also compared the rates to the average results for 2012 cars and highlighted areas where the Mercedes-Benz B-Class is unusually good or bad.

  • 6.8% fail on Suspension (28% better than other 2012 cars)
    • 3.3% fail on Springs (25% better than other 2012 cars)
      • 3.3% fail on Coil springs (25% better than other 2012 cars)
        • 3.3% fail on Coil spring (25% better than other 2012 cars)
    • 2.1% fail on Anti-roll bars (32% worse than other 2012 cars)
      • 1.3% fail on Linkage ball joint dust cover (2 times worse than other 2012 cars)
      • 0.59% fail on Ball joint dust cover (2 times worse than other 2012 cars)
      • 0.099% fail on Linkage ball joints (84% better than other 2012 cars)
      • 0.082% fail on Ball joint
      • 0.033% fail on Linkage pins and bushes
    • 1.8% fail on Suspension arms (41% better than other 2012 cars)
      • 1.6% fail on Ball joint
      • 0.13% fail on Ball joint dust cover (63% better than other 2012 cars)
      • 0.082% fail on Pins and bushes (93% better than other 2012 cars)
    • 0.082% fail on Other suspension component
      • 0.066% fail on Ball joint
      • 0.016% fail on Ball joint dust cover
    • 0.033% fail on Wheel bearings (90% better than other 2012 cars)
    • 0.016% fail on Shock absorbers
    • 0.016% fail on Suspension rods
      • 0.016% fail on Ball joint dust cover
  • 6.4% fail on Lamps, reflectors and electrical equipment (30% better than other 2012 cars)
    • 2.3% fail on Registration plate lamp(s) (70% worse than other 2012 cars)
    • 1.4% fail on Headlamp aim (42% better than other 2012 cars)
      • 1.3% fail on Headlamp aim (40% better than other 2012 cars)
      • 0.082% fail on Headlamp aim not tested (66% better than other 2012 cars)
    • 1.2% fail on Stop lamp (42% better than other 2012 cars)
    • 1.1% fail on Headlamps (52% better than other 2012 cars)
      • 0.84% fail on Headlamp (61% better than other 2012 cars)
      • 0.25% fail on Headlamp cleaning device (3 times worse than other 2012 cars)
      • 0.033% fail on Headlamp levelling device
    • 0.69% fail on Direction indicators (59% better than other 2012 cars)
      • 0.69% fail on Flashing type (58% better than other 2012 cars)
        • 0.53% fail on Side repeaters
        • 0.16% fail on Individual direction indicators (83% better than other 2012 cars)
    • 0.30% fail on Reversing lamps
      • 0.30% fail on Reversing lamps
    • 0.066% fail on Front and rear fog lamps (83% better than other 2012 cars)
      • 0.066% fail on Rear fog lamp (83% better than other 2012 cars)
        • 0.066% fail on Rear fog lamp (83% better than other 2012 cars)
    • 0.049% fail on Electrical equipment (78% better than other 2012 cars)
      • 0.049% fail on Horn
    • 0.016% fail on Position lamps
      • 0.016% fail on Position lamp
    • 0.016% fail on Hazard warning
      • 0.016% fail on Switch
  • 5.8% fail on Tyres
    • 3.8% fail on Condition (44% worse than other 2012 cars)
    • 2.2% fail on Tread depth (29% better than other 2012 cars)
    • 0.033% fail on Size/type
  • 4.5% fail on Brakes (26% better than other 2012 cars)
    • 2.3% fail on Mechanical brake components
      • 2.0% fail on Brake linings and pads
        • 2.0% fail on Brake pads
        • 0.016% fail on Brake linings
      • 0.48% fail on Brake discs and drums (51% better than other 2012 cars)
        • 0.46% fail on Brake discs (52% better than other 2012 cars)
        • 0.016% fail on Brake drums
    • 1.4% fail on Rigid brake pipes (2 times worse than other 2012 cars)
    • 0.76% fail on Brake performance (71% better than other 2012 cars)
      • 0.35% fail on Service brake performance (75% better than other 2012 cars)
        • 0.35% fail on Rbt (75% better than other 2012 cars)
          • 0.31% fail on Service brake performance (73% better than other 2012 cars)
          • 0.033% fail on Service brake imbalance (88% better than other 2012 cars)
      • 0.16% fail on Service Brake Efficiency (sp) (60% better than other 2012 cars)
        • 0.16% fail on Rbt (sp) (59% better than other 2012 cars)
          • 0.15% fail on Service brake performance
          • 0.049% fail on Service brake imbalance (83% better than other 2012 cars)
      • 0.15% fail on Brake performance not tested
      • 0.15% fail on Parking brake efficiency (sp) (85% better than other 2012 cars)
        • 0.15% fail on Rbt (sp) (85% better than other 2012 cars)
    • 0.33% fail on ABS / EBS / ESC
      • 0.31% fail on Anti-lock braking system
      • 0.18% fail on Electronic stability control
      • 0.033% fail on Electronic braking system
    • 0.13% fail on Parking brake control
      • 0.13% fail on Electronic parking brake (2 times worse than other 2012 cars)
    • 0.049% fail on Hydraulic systems
      • 0.049% fail on Brake fluid
    • 0.016% fail on Service brake pedal or hand lever
      • 0.016% fail on Pedal
    • 0.016% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.016% fail on Hydraulic brake callipers
    • 0.016% fail on Other components and prescribed areas
      • 0.016% fail on Other components
  • 2.4% fail on Visibility (47% better than other 2012 cars)
    • 1.5% fail on Washers (29% better than other 2012 cars)
    • 0.94% fail on Wipers (59% better than other 2012 cars)
    • 0.049% fail on Condition of glass
      • 0.049% fail on Windscreen
    • 0.016% fail on Driver's view
  • 2.1% fail on Noise, emissions and leaks
    • 2.1% fail on Exhaust emissions
      • 1.2% fail on Spark ignition
        • 1.2% fail on Malfunction indicator lamp (85% worse than other 2012 cars)
        • 0.016% fail on Non catalyst emissions
        • 0.016% fail on Catalyst emissions
        • 0.016% fail on Emissions not tested
      • 0.87% fail on Compression ignition
        • 0.79% fail on Malfunction indicator lamp (100% worse than other 2012 cars)
        • 0.066% fail on On or after 01/07/2008 (70% better than other 2012 cars)
        • 0.033% fail on Emissions not tested
    • 0.016% fail on Noise suppression
      • 0.016% fail on Undertray
    • 0.016% fail on Fluid leaks
      • 0.016% fail on Other leaks
  • 1.8% fail on Seat belts and supplementary restraint systems (180% worse than other 2012 cars)
    • 1.5% fail on SRS malfunction indicator lamp (2 times worse than other 2012 cars)
    • 0.26% fail on Seat belts
      • 0.23% fail on Condition
      • 0.016% fail on Attachment
      • 0.016% fail on Requirements
    • 0.12% fail on Airbags (7 times worse than other 2012 cars)
      • 0.066% fail on Passengers airbag (27 times worse than other 2012 cars)
      • 0.049% fail on Drivers airbag
  • 1.4% fail on Road Wheels (2 times worse than other 2012 cars)
    • 1.2% fail on Condition (11 times worse than other 2012 cars)
    • 0.28% fail on Attachment
    • 0.016% fail on Hubs
  • 0.96% fail on Body, chassis, structure (62% better than other 2012 cars)
    • 0.48% fail on Doors (2 times worse than other 2012 cars)
      • 0.43% fail on Other passenger's door (7 times worse than other 2012 cars)
        • 0.41% fail on Door condition (7 times worse than other 2012 cars)
        • 0.016% fail on Catch
      • 0.049% fail on Front passenger's door
        • 0.049% fail on Door condition
    • 0.36% fail on Transmission (66% better than other 2012 cars)
      • 0.36% fail on Drive shafts (65% better than other 2012 cars)
        • 0.35% fail on Joints (66% better than other 2012 cars)
        • 0.016% fail on Drive shaft
    • 0.049% fail on Exhaust system (95% better than other 2012 cars)
    • 0.049% fail on Fuel system
      • 0.033% fail on Fuel cap/sealing device
      • 0.016% fail on System
    • 0.033% fail on Undertray
    • 0.016% fail on Bumpers
    • 0.016% fail on Body
      • 0.016% fail on Other body component
  • 0.28% fail on Identification of the vehicle
    • 0.28% fail on Registration plates
  • 0.25% fail on Steering (84% better than other 2012 cars)
    • 0.099% fail on Steering linkage components (93% better than other 2012 cars)
      • 0.066% fail on Track rod end (95% better than other 2012 cars)
      • 0.016% fail on Ball joint
      • 0.016% fail on Drag link end
    • 0.049% fail on Steering gear
      • 0.049% fail on Steering rack
    • 0.033% fail on Steering play
      • 0.033% fail on Steering rack
    • 0.033% fail on Electronic power steering
    • 0.016% fail on Power steering
      • 0.016% fail on Operation
    • 0.016% fail on Steering wheel
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