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Mercedes-Benz SL-Class MOT Results

75.5% pass rate
from 204 tests in 2017
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 SL-Class is unusually good or bad.

  • 15% fail on Lamps, Reflectors and Electrical Equipment
    • 6.9% fail on Headlamp aim
    • 5.4% fail on Direction indicators
      • 5.4% fail on Flashing type
        • 2.9% fail on Individual lamps
        • 1.5% fail on Tell tales (4 times worse than other pre-1990 cars)
        • 0.98% fail on All direction indicators
        • 0.49% fail on Switch
    • 3.4% fail on Position lamps
      • 2.0% fail on Front lamps
      • 2.0% fail on Rear lamps
    • 3.4% fail on Stop lamp
    • 2.0% fail on Headlamps
      • 2.0% fail on Headlamp
      • 0.49% fail on Headlamp defects which don't require an aim check on retest
        • 0.49% fail on Main beam 'tell-tale'
    • 1.5% fail on Registration plate lamp
    • 1.5% fail on Rear fog lamp
      • 0.98% fail on Fog lamp
      • 0.98% fail on Tell tale
    • 0.98% fail on Battery
    • 0.49% fail on Hazard warning
      • 0.49% fail on Lamp
    • 0.49% fail on Horn
    • 0.49% fail on Headlamp aim not tested
  • 8.8% fail on Brakes
    • 5.9% fail on Brake performance
      • 2.5% fail on Front wheels
      • 2.0% fail on Rear wheels
      • 1.5% fail on Parking brake performance
      • 0.98% fail on Brake imbalance
    • 2.9% fail on Hydraulic systems
      • 2.5% fail on Components
        • 1.5% fail on Hoses
        • 0.98% fail on Pipes
      • 0.49% fail on Operation
    • 0.98% fail on Hub components
      • 0.98% fail on Brake calipers (6 times worse than other pre-1990 cars)
    • 0.49% fail on Prescribed areas
      • 0.49% fail on Master cylinder/servo mounting
  • 7.8% fail on Driver's view of the road
    • 6.9% fail on Washers
    • 1.5% fail on Wipers
  • 6.9% fail on Body, Structure and General Items
    • 4.9% fail on Body condition (2 times worse than other pre-1990 cars)
    • 1.5% fail on Vehicle structure
      • 1.5% fail on Chassis
    • 0.98% fail on Seats
      • 0.98% fail on Drivers
    • 0.49% fail on Doors
      • 0.49% fail on Passengers front
  • 5.4% fail on Exhaust, Fuel and Emissions
    • 2.9% fail on Exhaust system
    • 2.0% fail on Emissions
    • 0.49% fail on Fuel system
      • 0.49% fail on Pipe
  • 4.9% fail on Suspension
    • 4.4% fail on Prescribed areas
      • 3.4% fail on Component mounting
      • 0.98% fail on Subframe mounting
    • 0.49% fail on Wheel bearings
      • 0.49% fail on Front
  • 2.9% fail on Seat Belts and Supplementary Restraint Systems
    • 2.9% fail on Seat belts
      • 2.0% fail on Prescribed areas
      • 0.98% fail on Condition
      • 0.49% fail on Attachment
  • 2.5% fail on Steering
    • 1.5% fail on Steering system
      • 0.49% fail on Steering box
      • 0.49% fail on Track rod end
      • 0.49% fail on Steering arm
    • 0.49% fail on Steering operation
    • 0.49% fail on Prescribed areas
  • 1.5% fail on Tyres
    • 1.5% fail on Condition
  • 1.5% fail on Registration plates and VIN
    • 1.5% fail on Registration plate
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