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Mercedes-Benz SL-Class MOT Results

81.6% pass rate
from 141 tests in 2020
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.

  • 8.5% fail on Lamps, reflectors and electrical equipment
    • 2.8% fail on Headlamps
      • 2.8% fail on Headlamp
    • 2.1% fail on Headlamp aim
      • 2.1% fail on Headlamp aim
    • 1.4% fail on Direction indicators
      • 1.4% fail on Flashing type
        • 0.71% fail on All direction indicators
        • 0.71% fail on Individual direction indicators
    • 1.4% fail on Registration plate lamp(s)
    • 0.71% fail on Position lamps
      • 0.71% fail on Position lamp
    • 0.71% fail on Stop lamp
    • 0.71% fail on Front and rear fog lamps
      • 0.71% fail on Rear fog lamp
        • 0.71% fail on Rear fog lamp
    • 0.71% fail on Mandatory tell-tales
      • 0.71% fail on Rear fog lamp tell-tale
    • 0.71% fail on Electrical equipment
      • 0.71% fail on Horn
  • 7.8% fail on Body, chassis, structure
    • 3.5% fail on Fuel system (2 times worse than other pre-1990 cars)
      • 2.8% fail on Pipe (7 times worse than other pre-1990 cars)
      • 0.71% fail on Hose
    • 2.1% fail on Integral vehicle structure
      • 2.1% fail on Integral vehicle structure condition
    • 2.1% fail on Exhaust system
    • 1.4% fail on Chassis
      • 1.4% fail on Chassis condition
    • 0.71% fail on Bumpers
  • 5.7% fail on Brakes
    • 5.0% fail on Brake performance
      • 3.5% fail on Service brake performance
        • 3.5% fail on Rbt
          • 2.8% fail on Service brake performance
          • 1.4% fail on Service brake imbalance
      • 2.1% fail on Parking brake performance
        • 2.1% fail on Rbt
          • 2.1% fail on Parking brake performance
      • 2.1% fail on Parking brake efficiency (sp)
        • 2.1% fail on Rbt (sp)
      • 0.71% fail on Service Brake Efficiency (sp)
        • 0.71% fail on Rbt (sp)
          • 0.71% fail on Service brake imbalance
    • 0.71% fail on Parking brake control
      • 0.71% fail on Lever
    • 0.71% fail on Hydraulic systems
      • 0.71% fail on Master cylinder
    • 0.71% fail on Rigid brake pipes
    • 0.71% fail on Other components and prescribed areas
      • 0.71% fail on Prescribed areas
        • 0.71% fail on Master cylinder/servo mounting
    • 0.71% fail on Mechanical brake components
      • 0.71% fail on Brake linings and pads
        • 0.71% fail on Brake pads
  • 5.7% fail on Visibility
    • 4.3% fail on Washers
    • 2.8% fail on Wipers
    • 0.71% fail on View to rear
      • 0.71% fail on Mirrors
  • 3.5% fail on Suspension
    • 2.1% fail on Component mounting prescribed areas
    • 1.4% fail on Suspension arms
      • 1.4% fail on Ball joint
    • 0.71% fail on Springs
      • 0.71% fail on Coil springs
        • 0.71% fail on Coil spring
  • 2.8% fail on Tyres
    • 2.8% fail on Tread depth (2 times worse than other pre-1990 cars)
  • 1.4% fail on Seat belts and supplementary restraint systems
    • 1.4% fail on Seat belts
      • 0.71% fail on Prescribed areas
      • 0.71% fail on Condition
  • 0.71% fail on Identification of the vehicle
    • 0.71% fail on Registration plates
  • 0.71% fail on Steering
    • 0.71% fail on Steering linkage components
      • 0.71% fail on Track rod end
  • 0.71% fail on Noise, emissions and leaks
    • 0.71% fail on Exhaust emissions
      • 0.71% fail on Spark ignition
        • 0.71% fail on Non catalyst emissions
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