Mercedes-Benz B-Class MOT Results

Registered in 2012
75.1% pass rate
from 883 tests in 2020
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.

  • 7.8% fail on Lamps, reflectors and electrical equipment
    • 3.1% fail on Registration plate lamp(s) (130% worse than other 2012 cars)
    • 1.7% fail on Stop lamp
    • 1.1% fail on Headlamp aim
      • 1.1% fail on Headlamp aim
    • 1.1% fail on Direction indicators
      • 1.1% fail on Flashing type
        • 0.91% fail on Side repeaters
        • 0.23% fail on Individual direction indicators
    • 0.91% fail on Headlamps
      • 0.45% fail on Headlamp (77% better than other 2012 cars)
      • 0.45% fail on Headlamp cleaning device (5 times worse than other 2012 cars)
    • 0.23% fail on Position lamps (80% better than other 2012 cars)
      • 0.23% fail on Position lamp (80% better than other 2012 cars)
    • 0.23% fail on Reversing lamps
      • 0.23% fail on Reversing lamps
    • 0.11% fail on Hazard warning
      • 0.11% fail on Switch
    • 0.11% fail on Front and rear fog lamps
      • 0.11% fail on Rear fog lamp
        • 0.11% fail on Rear fog lamp
    • 0.11% fail on Rear reflectors
  • 5.4% fail on Tyres
    • 3.3% fail on Condition
    • 2.4% fail on Tread depth
    • 0.11% fail on Size/type
  • 4.0% fail on Brakes
    • 2.2% fail on Mechanical brake components
      • 1.8% fail on Brake linings and pads
        • 1.8% fail on Brake pads
      • 0.57% fail on Brake discs and drums
        • 0.57% fail on Brake discs
    • 1.6% fail on Brake performance
      • 0.57% fail on Service brake performance
        • 0.57% fail on Rbt
          • 0.45% fail on Service brake performance
          • 0.11% fail on Service brake imbalance
      • 0.57% fail on Service Brake Efficiency (sp)
        • 0.57% fail on Rbt (sp)
          • 0.57% fail on Service brake performance (4 times worse than other 2012 cars)
      • 0.34% fail on Parking brake efficiency (sp)
        • 0.34% fail on Rbt (sp)
      • 0.11% fail on Brake performance not tested
    • 0.23% fail on Rigid brake pipes
    • 0.11% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.11% fail on Hydraulic brake cylinder
    • 0.11% fail on ABS / EBS / ESC
      • 0.11% fail on Anti-lock braking system
  • 3.6% fail on Suspension (44% better than other 2012 cars)
    • 2.3% fail on Suspension arms
      • 2.2% fail on Ball joint (120% worse than other 2012 cars)
      • 0.11% fail on Pins and bushes
    • 1.1% fail on Springs (60% better than other 2012 cars)
      • 1.1% fail on Coil springs (60% better than other 2012 cars)
        • 1.1% fail on Coil spring (60% better than other 2012 cars)
    • 0.11% fail on Anti-roll bars
      • 0.11% fail on Ball joint
    • 0.11% fail on Other suspension component
      • 0.11% fail on Ball joint
  • 2.8% fail on Road Wheels (7 times worse than other 2012 cars)
    • 2.5% fail on Condition (25 times worse than other 2012 cars)
    • 0.34% fail on Attachment
  • 2.7% fail on Visibility
    • 1.4% fail on Wipers
    • 1.0% fail on Washers
    • 0.34% fail on View to rear
      • 0.34% fail on Mirrors
  • 1.4% fail on Noise, emissions and leaks
    • 1.4% fail on Exhaust emissions
      • 1.0% fail on Spark ignition
        • 1.0% fail on Malfunction indicator lamp
      • 0.34% fail on Compression ignition
        • 0.23% fail on Malfunction indicator lamp
        • 0.11% fail on On or after 01/07/2008
    • 0.11% fail on Fluid leaks
      • 0.11% fail on Engine oil leaks
  • 1.2% fail on Seat belts and supplementary restraint systems (140% worse than other 2012 cars)
    • 0.68% fail on SRS malfunction indicator lamp
    • 0.34% fail on Seat belts
      • 0.34% fail on Condition
    • 0.23% fail on Airbags (17 times worse than other 2012 cars)
      • 0.23% fail on Passengers airbag (101 times worse than other 2012 cars)
  • 0.57% fail on Body, chassis, structure (67% better than other 2012 cars)
    • 0.45% fail on Transmission
      • 0.45% fail on Drive shafts
        • 0.45% fail on Joints
    • 0.11% fail on Doors
      • 0.11% fail on Other passenger's door
        • 0.11% fail on Door condition
  • 0.23% fail on Identification of the vehicle
    • 0.23% fail on Registration plates
  • 0.11% fail on Steering
    • 0.11% fail on Steering linkage components
      • 0.11% fail on Ball joint
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