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Mercedes-Benz CLA MOT Results

58.3% pass rate
from 319 tests in 2017
(43% worse than other pre-1990 cars)
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 pre-1990 cars and highlighted areas where the Mercedes-Benz CLA is unusually good or bad.

  • 31% fail on Lamps, Reflectors and Electrical Equipment (86% worse than other pre-1990 cars)
    • 10% fail on Headlamp aim (140% worse than other pre-1990 cars)
    • 9.4% fail on Registration plate lamp (2 times worse than other pre-1990 cars)
    • 8.8% fail on Position lamps (140% worse than other pre-1990 cars)
      • 5.3% fail on Rear lamps (2 times worse than other pre-1990 cars)
      • 4.4% fail on Front lamps (100% worse than other pre-1990 cars)
      • 0.63% fail on All position lamps
      • 0.31% fail on Switch
    • 8.2% fail on Direction indicators (140% worse than other pre-1990 cars)
      • 8.2% fail on Flashing type (140% worse than other pre-1990 cars)
        • 3.4% fail on Individual lamps
        • 2.2% fail on All direction indicators
        • 2.2% fail on Side repeaters (2 times worse than other pre-1990 cars)
        • 0.94% fail on Tell tales
        • 0.94% fail on Switch (6 times worse than other pre-1990 cars)
    • 7.8% fail on Rear fog lamp (2 times worse than other pre-1990 cars)
      • 6.9% fail on Fog lamp (2 times worse than other pre-1990 cars)
      • 2.8% fail on Tell tale (5 times worse than other pre-1990 cars)
      • 0.31% fail on Switch
    • 6.9% fail on Stop lamp (140% worse than other pre-1990 cars)
    • 6.3% fail on Headlamps (84% worse than other pre-1990 cars)
      • 5.6% fail on Headlamp (85% worse than other pre-1990 cars)
      • 0.63% fail on Switch
      • 0.63% fail on Dipswitch (9 times worse than other pre-1990 cars)
      • 0.31% fail on Headlamp defects which don't require an aim check on retest
        • 0.31% fail on Main beam 'tell-tale'
    • 4.4% fail on Horn (110% worse than other pre-1990 cars)
    • 2.2% fail on Hazard warning
      • 1.3% fail on Lamp
      • 1.3% fail on Switch (3 times worse than other pre-1990 cars)
    • 1.6% fail on Battery
    • 1.3% fail on Electrical wiring (4 times worse than other pre-1990 cars)
    • 0.31% fail on Rear reflectors
  • 18% fail on Brakes (59% worse than other pre-1990 cars)
    • 15% fail on Brake performance (83% worse than other pre-1990 cars)
      • 6.6% fail on Front wheels
      • 6.3% fail on Rear wheels
      • 6.3% fail on Service brake performance (3 times worse than other pre-1990 cars)
      • 4.1% fail on Parking brake performance
      • 3.4% fail on Brake imbalance (4 times worse than other pre-1990 cars)
      • 0.63% fail on Brake performance not tested
    • 6.9% fail on Hydraulic systems (110% worse than other pre-1990 cars)
      • 6.9% fail on Components (160% worse than other pre-1990 cars)
        • 3.4% fail on Valves (39 times worse than other pre-1990 cars)
        • 2.2% fail on Pipes
        • 1.6% fail on Hoses
        • 0.31% fail on Reservoirs
      • 0.31% fail on Leaks
    • 1.6% fail on Prescribed areas (6 times worse than other pre-1990 cars)
      • 1.6% fail on Master cylinder/servo mounting (8 times worse than other pre-1990 cars)
    • 1.3% fail on Service brake control components
      • 1.3% fail on Pedal
        • 0.94% fail on Condition (3 times worse than other pre-1990 cars)
        • 0.31% fail on Anti-slip
    • 0.94% fail on Restricted movement
    • 0.63% fail on Parking brake
      • 0.63% fail on Condition
    • 0.31% fail on Hub components
      • 0.31% fail on Brake pads
    • 0.31% fail on Locking devices
  • 13% fail on Driver's view of the road (90% worse than other pre-1990 cars)
    • 9.1% fail on Washers (92% worse than other pre-1990 cars)
    • 7.8% fail on Wipers (180% worse than other pre-1990 cars)
    • 1.3% fail on Windscreen (5 times worse than other pre-1990 cars)
    • 0.63% fail on Bonnet
    • 0.63% fail on Mirrors
  • 10% fail on Suspension
    • 4.7% fail on Prescribed areas
      • 3.1% fail on Component mounting
      • 1.6% fail on Spring mounting
      • 1.3% fail on Subframe mounting
    • 1.9% fail on Wheel bearings
      • 0.94% fail on Front
      • 0.94% fail on Rear
    • 1.3% fail on Leaf springs (3 times worse than other pre-1990 cars)
      • 0.94% fail on Pins and bushes (7 times worse than other pre-1990 cars)
        • 0.63% fail on Shackle (6 times worse than other pre-1990 cars)
        • 0.31% fail on Anchor
      • 0.31% fail on Condition
    • 1.3% fail on Suspension arms
      • 1.3% fail on Pins/bushes/ball joints
    • 0.94% fail on Shock absorbers
      • 0.94% fail on Condition
    • 0.63% fail on Anti-roll bars
      • 0.31% fail on Pins/bushes/ball joints
      • 0.31% fail on Linkage condition
    • 0.31% fail on Air suspension
      • 0.31% fail on Suspension unit
    • 0.31% fail on Trailing arms
      • 0.31% fail on Attachment
    • 0.31% fail on Sub-frames
      • 0.31% fail on Attachment
  • 8.8% fail on Body, Structure and General Items (150% worse than other pre-1990 cars)
    • 3.8% fail on Body condition (180% worse than other pre-1990 cars)
    • 2.8% fail on Seats (3 times worse than other pre-1990 cars)
      • 2.2% fail on Drivers (3 times worse than other pre-1990 cars)
      • 1.3% fail on Passengers (3 times worse than other pre-1990 cars)
    • 2.2% fail on Vehicle structure
      • 2.2% fail on Chassis
    • 0.94% fail on Doors
      • 0.63% fail on Passengers front
      • 0.31% fail on Drivers
      • 0.31% fail on Passengers other
    • 0.31% fail on Speedometer
    • 0.31% fail on Body security
  • 7.8% fail on Exhaust, Fuel and Emissions
    • 5.3% fail on Exhaust system (120% worse than other pre-1990 cars)
    • 2.5% fail on Fuel system
      • 1.3% fail on Cap (3 times worse than other pre-1990 cars)
      • 0.94% fail on System
      • 0.31% fail on Pipe
    • 0.94% fail on Emissions not tested
    • 0.63% fail on Emissions
  • 7.2% fail on Steering
    • 5.3% fail on Steering system
      • 3.1% fail on Track rod end
      • 1.9% fail on Drag link end (5 times worse than other pre-1990 cars)
      • 0.94% fail on Ball joint
      • 0.31% fail on Free play
        • 0.31% fail on Steering box
    • 1.6% fail on Power steering (3 times worse than other pre-1990 cars)
      • 0.94% fail on Operation (12 times worse than other pre-1990 cars)
      • 0.31% fail on Pipes and hoses
      • 0.31% fail on Other components
    • 0.63% fail on Locking devices
    • 0.63% fail on Prescribed areas
    • 0.31% fail on Steering control
      • 0.31% fail on Steering column
  • 4.7% fail on Tyres (110% worse than other pre-1990 cars)
    • 3.4% fail on Condition (170% worse than other pre-1990 cars)
    • 1.3% fail on Tread depth
    • 0.31% fail on Size/type
  • 1.9% fail on Seat Belts and Supplementary Restraint Systems
    • 1.9% fail on Seat belts
      • 0.63% fail on Requirements
      • 0.63% fail on Condition
      • 0.63% fail on Prescribed areas
  • 1.3% fail on Registration plates and VIN
    • 0.94% fail on Registration plate
    • 0.31% fail on Vehicle Identification Number
  • 0.31% fail on Towbars
    • 0.31% fail on Towbar
  • 0.31% fail on Road Wheels
    • 0.31% fail on Attachment