Mercedes-Benz B-Class MOT Results

Registered in 2011
65.1% pass rate
from 3,918 tests in 2021
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 2011 cars and highlighted areas where the Mercedes-Benz B-Class is unusually good or bad.

  • 16% fail on Lamps, reflectors and electrical equipment (56% worse than other 2011 cars)
    • 9.7% fail on Direction indicators (4 times worse than other 2011 cars)
      • 9.7% fail on Flashing type (4 times worse than other 2011 cars)
        • 6.2% fail on Side repeaters (8 times worse than other 2011 cars)
        • 3.9% fail on Individual direction indicators (2 times worse than other 2011 cars)
        • 0.33% fail on All direction indicators (3 times worse than other 2011 cars)
    • 3.8% fail on Headlamps (44% worse than other 2011 cars)
      • 3.6% fail on Headlamp (48% worse than other 2011 cars)
      • 0.15% fail on Headlamp levelling device
    • 3.0% fail on Headlamp aim
      • 2.5% fail on Headlamp aim
      • 0.54% fail on Headlamp aim not tested (98% worse than other 2011 cars)
    • 1.6% fail on Stop lamp (33% better than other 2011 cars)
    • 0.59% fail on Registration plate lamp(s) (64% better than other 2011 cars)
    • 0.20% fail on Front and rear fog lamps
      • 0.20% fail on Rear fog lamp
        • 0.20% fail on Rear fog lamp
    • 0.10% fail on Position lamps
      • 0.10% fail on Position lamp
    • 0.10% fail on Reversing lamps
      • 0.10% fail on Reversing lamps
    • 0.026% fail on Rear reflectors
  • 9.3% fail on Brakes (37% worse than other 2011 cars)
    • 4.6% fail on Brake performance (45% worse than other 2011 cars)
      • 2.2% fail on Service Brake Efficiency (sp) (3 times worse than other 2011 cars)
        • 2.2% fail on Rbt (sp) (3 times worse than other 2011 cars)
          • 2.1% fail on Service brake performance (8 times worse than other 2011 cars)
          • 0.20% fail on Service brake imbalance
      • 1.6% fail on Parking brake efficiency (sp)
        • 1.6% fail on Rbt (sp)
        • 0.026% fail on Decelerometer (sp)
        • 0.026% fail on Plate brake tester (sp)
      • 1.1% fail on Service brake performance
        • 1.1% fail on Rbt
          • 0.87% fail on Service brake performance (36% better than other 2011 cars)
          • 0.26% fail on Service brake imbalance
        • 0.051% fail on Plate brake tester
          • 0.051% fail on Service brake efficiency (Trikes, quads and pre-68 vehicles)
      • 0.66% fail on Parking brake performance
        • 0.61% fail on Rbt
          • 0.43% fail on Parking brake performance
          • 0.13% fail on Parking (secondary brake performance)
          • 0.051% fail on Parking brake efficiency (Trikes, quads and pre-68 vehicles)
        • 0.051% fail on Plate brake tester
          • 0.051% fail on Parking brake performance (5 times worse than other 2011 cars)
      • 0.13% fail on Brake performance not tested
    • 2.9% fail on Rigid brake pipes (4 times worse than other 2011 cars)
    • 2.5% fail on Mechanical brake components
      • 2.0% fail on Brake linings and pads
        • 1.9% fail on Brake pads
        • 0.077% fail on Brake linings (3 times worse than other 2011 cars)
      • 0.69% fail on Brake discs and drums
        • 0.69% fail on Brake discs
      • 0.026% fail on Brake cables, rods, levers and linkages
        • 0.026% fail on Cable
    • 0.36% fail on Parking brake control
      • 0.36% fail on Lever
    • 0.26% fail on Service brake pedal or hand lever
      • 0.20% fail on Hand lever
      • 0.051% fail on Pedal
    • 0.26% fail on ABS / EBS / ESC
      • 0.13% fail on Anti-lock braking system
      • 0.077% fail on Electronic stability control
      • 0.051% fail on Electronic braking system
    • 0.026% fail on Flexible brake hoses
    • 0.026% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.026% fail on Hydraulic brake callipers
  • 8.4% fail on Suspension (24% better than other 2011 cars)
    • 3.8% fail on Springs
      • 3.8% fail on Coil springs
        • 3.8% fail on Coil spring
    • 2.0% fail on Anti-roll bars
      • 1.4% fail on Linkage ball joint dust cover (78% worse than other 2011 cars)
      • 0.43% fail on Ball joint dust cover
      • 0.13% fail on Linkage ball joints (84% better than other 2011 cars)
      • 0.026% fail on Attachment bracket and mounting
      • 0.026% fail on Linkage
      • 0.026% fail on Linkage pins and bushes
      • 0.026% fail on Ball joint
    • 1.7% fail on Suspension arms (55% better than other 2011 cars)
      • 1.4% fail on Ball joint
      • 0.18% fail on Pins and bushes (89% better than other 2011 cars)
      • 0.10% fail on Ball joint dust cover (72% better than other 2011 cars)
    • 1.2% fail on Shock absorbers (76% worse than other 2011 cars)
    • 0.23% fail on Wheel bearings
    • 0.15% fail on Other suspension component
      • 0.13% fail on Ball joint
      • 0.026% fail on Ball joint dust cover
    • 0.077% fail on Macpherson strut
      • 0.051% fail on Macpherson strut
      • 0.026% fail on Pins and bushes
    • 0.026% fail on Suspension rods
      • 0.026% fail on Pins and bushes
  • 4.8% fail on Tyres (18% better than other 2011 cars)
    • 3.3% fail on Condition
    • 1.6% fail on Tread depth (50% better than other 2011 cars)
    • 0.18% fail on Size/type
  • 3.6% fail on Noise, emissions and leaks (45% worse than other 2011 cars)
    • 3.6% fail on Exhaust emissions (53% worse than other 2011 cars)
      • 2.1% fail on Spark ignition (40% worse than other 2011 cars)
        • 1.8% fail on Malfunction indicator lamp (130% worse than other 2011 cars)
        • 0.33% fail on Catalyst emissions
        • 0.077% fail on Emissions not tested
        • 0.026% fail on Non catalyst emissions
      • 1.5% fail on Compression ignition (75% worse than other 2011 cars)
        • 1.2% fail on Malfunction indicator lamp (170% worse than other 2011 cars)
        • 0.15% fail on On or after 01/07/2008
        • 0.077% fail on Emissions not tested
        • 0.051% fail on Pre 01/07/2008 Turbo
        • 0.026% fail on Emission control equipment
          • 0.026% fail on Particulate filter
        • 0.026% fail on On or after 01/01/2014
    • 0.026% fail on Fluid leaks
      • 0.026% fail on Engine oil leaks
  • 3.5% fail on Visibility (26% better than other 2011 cars)
    • 2.4% fail on Washers
    • 0.69% fail on Wipers (71% better than other 2011 cars)
    • 0.46% fail on Bonnet (3 times worse than other 2011 cars)
    • 0.13% fail on Condition of glass
      • 0.13% fail on Windscreen
    • 0.051% fail on View to rear
      • 0.051% fail on Mirrors
  • 2.8% fail on Body, chassis, structure
    • 1.5% fail on Transmission
      • 1.5% fail on Drive shafts
        • 1.5% fail on Joints
      • 0.026% fail on Prop shafts
        • 0.026% fail on Joints
    • 0.51% fail on Exhaust system (60% better than other 2011 cars)
    • 0.26% fail on Fuel system
      • 0.18% fail on Fuel cap/sealing device
      • 0.077% fail on Pipe
    • 0.20% fail on Bumpers
    • 0.15% fail on Engine mounting (5 times worse than other 2011 cars)
      • 0.15% fail on Engine mounting condition (7 times worse than other 2011 cars)
    • 0.13% fail on Body
      • 0.051% fail on Panel
      • 0.051% fail on Other body component
      • 0.026% fail on Body condition
    • 0.10% fail on Doors
      • 0.077% fail on Driver's door
        • 0.077% fail on Door condition
      • 0.026% fail on Other passenger's door
        • 0.026% fail on Door condition
    • 0.026% fail on Boot lid
      • 0.026% fail on Boot lid condition
    • 0.026% fail on Undertray
  • 1.1% fail on Seat belts and supplementary restraint systems
    • 0.56% fail on Seat belts
      • 0.56% fail on Condition (83% worse than other 2011 cars)
    • 0.51% fail on SRS malfunction indicator lamp
  • 0.36% fail on Steering (81% better than other 2011 cars)
    • 0.31% fail on Steering linkage components (80% better than other 2011 cars)
      • 0.18% fail on Track rod end (88% better than other 2011 cars)
      • 0.077% fail on Ball joint
      • 0.026% fail on Drag link end
      • 0.026% fail on Locking devices
    • 0.026% fail on Steering gear
      • 0.026% fail on Steering rack
    • 0.026% fail on Steering play
      • 0.026% fail on Steering rack
    • 0.026% fail on Electronic power steering
  • 0.28% fail on Road Wheels
    • 0.23% fail on Attachment
    • 0.051% fail on Condition
  • 0.26% fail on Identification of the vehicle
    • 0.26% fail on Registration plates
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