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Mercedes-Benz SL MOT Results

75.7% pass rate
from 1,095 tests in 2020
Number of tests by age
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 is unusually good or bad.

  • 11% fail on Lamps, reflectors and electrical equipment (20% better than other pre-1990 cars)
    • 5.9% fail on Headlamp aim (68% worse than other pre-1990 cars)
      • 5.6% fail on Headlamp aim (68% worse than other pre-1990 cars)
      • 0.46% fail on Headlamp aim not tested
    • 1.7% fail on Headlamps
      • 1.6% fail on Headlamp (46% better than other pre-1990 cars)
      • 0.18% fail on Headlamp levelling device
    • 1.7% fail on Direction indicators
      • 1.7% fail on Flashing type
        • 1.1% fail on All direction indicators
        • 0.46% fail on Individual direction indicators (72% better than other pre-1990 cars)
        • 0.091% fail on Side repeaters
        • 0.091% fail on Switch
    • 1.4% fail on Stop lamp
    • 1.4% fail on Electrical equipment
      • 1.0% fail on Horn
      • 0.37% fail on Battery(ies)
    • 1.1% fail on Position lamps
      • 1.1% fail on Position lamp
    • 0.73% fail on Front and rear fog lamps (69% better than other pre-1990 cars)
      • 0.73% fail on Rear fog lamp (69% better than other pre-1990 cars)
        • 0.73% fail on Rear fog lamp (68% better than other pre-1990 cars)
    • 0.55% fail on Registration plate lamp(s)
    • 0.37% fail on Hazard warning
      • 0.37% fail on Switch
    • 0.091% fail on Mandatory tell-tales
      • 0.091% fail on Rear fog lamp tell-tale
  • 7.2% fail on Body, chassis, structure
    • 2.2% fail on Integral vehicle structure (120% worse than other pre-1990 cars)
      • 2.2% fail on Integral vehicle structure condition (120% worse than other pre-1990 cars)
    • 1.9% fail on Exhaust system
    • 1.4% fail on Chassis
      • 1.4% fail on Chassis condition
    • 1.4% fail on Fuel system
      • 0.64% fail on Pipe
      • 0.46% fail on Hose
      • 0.18% fail on Fuel cap/sealing device
      • 0.18% fail on System
    • 0.37% fail on Doors
      • 0.27% fail on Front passenger's door
        • 0.27% fail on Door condition
      • 0.091% fail on Driver's door
        • 0.091% fail on Door condition
    • 0.37% fail on Seats
      • 0.37% fail on Driver's seat
    • 0.18% fail on Bumpers
    • 0.18% fail on Transmission (86% better than other pre-1990 cars)
      • 0.091% fail on Drive shafts
        • 0.091% fail on Joints
      • 0.091% fail on Prop shafts
        • 0.091% fail on Flexible couplings
    • 0.18% fail on Floor
    • 0.091% fail on Body
      • 0.091% fail on Other body component
    • 0.091% fail on Cabs
      • 0.091% fail on Prescribed areas
  • 6.9% fail on Brakes (27% better than other pre-1990 cars)
    • 4.8% fail on Brake performance (33% better than other pre-1990 cars)
      • 2.9% fail on Service brake performance
        • 2.9% fail on Rbt
          • 2.7% fail on Service brake performance
          • 0.18% fail on Service brake imbalance
      • 1.1% fail on Parking brake efficiency (sp) (63% better than other pre-1990 cars)
        • 1.0% fail on Rbt (sp) (63% better than other pre-1990 cars)
        • 0.091% fail on Decelerometer (sp)
      • 1.0% fail on Service Brake Efficiency (sp) (66% better than other pre-1990 cars)
        • 1.0% fail on Rbt (sp) (65% better than other pre-1990 cars)
          • 0.82% fail on Service brake performance
          • 0.55% fail on Service brake imbalance (73% better than other pre-1990 cars)
      • 0.46% fail on Brake performance not tested
      • 0.091% fail on Parking brake performance
        • 0.091% fail on Rbt
          • 0.091% fail on Parking brake performance
    • 0.82% fail on ABS / EBS / ESC (5 times worse than other pre-1990 cars)
      • 0.82% fail on Anti-lock braking system (5 times worse than other pre-1990 cars)
    • 0.64% fail on Flexible brake hoses
    • 0.46% fail on Rigid brake pipes
    • 0.27% fail on Hydraulic systems
      • 0.18% fail on Brake fluid
      • 0.091% fail on Valves
    • 0.18% fail on Service brake pedal or hand lever
      • 0.091% fail on Pedal
      • 0.091% fail on Hand lever
    • 0.18% fail on Parking brake control
      • 0.18% fail on Lever
    • 0.18% fail on Mechanical brake components (80% better than other pre-1990 cars)
      • 0.18% fail on Brake linings and pads
        • 0.18% fail on Brake pads
    • 0.091% fail on Pressure storage reservoirs
      • 0.091% fail on Full power hydraulic systems
    • 0.091% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.091% fail on Hydraulic brake callipers
  • 6.7% fail on Visibility
    • 4.5% fail on Washers
    • 2.6% fail on Wipers
    • 0.27% fail on Driver's view
    • 0.091% fail on Condition of glass
      • 0.091% fail on Windscreen
    • 0.091% fail on View to rear
      • 0.091% fail on Mirrors
  • 6.6% fail on Suspension
    • 3.3% fail on Component mounting prescribed areas
    • 1.1% fail on Suspension arms
      • 0.82% fail on Ball joint dust cover
      • 0.18% fail on Suspension arm
      • 0.091% fail on Attachment bracket and mounting
      • 0.091% fail on Pins and bushes
    • 1.0% fail on Sub-frames
      • 0.82% fail on Pins and bushes (9 times worse than other pre-1990 cars)
      • 0.091% fail on Sub-frame
      • 0.091% fail on Sub-frame mounting prescribed areas
    • 0.82% fail on Anti-roll bars
      • 0.37% fail on Linkage pins and bushes
      • 0.18% fail on Attachment bracket and mounting
      • 0.091% fail on Linkage
      • 0.091% fail on Ball joint
      • 0.091% fail on Linkage ball joints
    • 0.37% fail on Wheel bearings (76% better than other pre-1990 cars)
    • 0.37% fail on Springs
      • 0.27% fail on Coil springs
        • 0.27% fail on Coil spring
      • 0.091% fail on Spring mounting prescribed areas
    • 0.27% fail on Shock absorbers
    • 0.18% fail on Other suspension component
      • 0.091% fail on Other suspension component
      • 0.091% fail on Ball joint dust cover
    • 0.091% fail on Axles
      • 0.091% fail on Swivel pins and bushes
  • 2.5% fail on Noise, emissions and leaks (42% better than other pre-1990 cars)
    • 2.3% fail on Exhaust emissions
      • 2.2% fail on Spark ignition
        • 2.0% fail on Non catalyst emissions
        • 0.091% fail on Catalyst emissions
        • 0.091% fail on Emissions not tested
      • 0.091% fail on Compression ignition
        • 0.091% fail on On or after 01/07/2008
    • 0.18% fail on Fluid leaks
      • 0.091% fail on Engine oil leaks
      • 0.091% fail on Transmission oil leaks
      • 0.091% fail on Other leaks
    • 0.091% fail on Noise suppression
      • 0.091% fail on Sound deadening material
  • 2.1% fail on Steering (45% better than other pre-1990 cars)
    • 1.6% fail on Steering linkage components
      • 1.1% fail on Track rod end
      • 0.37% fail on Drag link end
      • 0.091% fail on Ball joint
    • 0.37% fail on Steering play
      • 0.37% fail on Steering box
    • 0.27% fail on Power steering
      • 0.18% fail on Pump
      • 0.18% fail on Other components
    • 0.091% fail on Steering gear
      • 0.091% fail on Steering box
  • 1.0% fail on Tyres
    • 0.73% fail on Condition
    • 0.37% fail on Tread depth
  • 0.64% fail on Identification of the vehicle
    • 0.64% fail on Registration plates
  • 0.64% fail on Seat belts and supplementary restraint systems (64% better than other pre-1990 cars)
    • 0.64% fail on Seat belts (63% better than other pre-1990 cars)
      • 0.64% fail on Condition
      • 0.091% fail on Prescribed areas
  • 0.091% fail on Speedometer and speed limiter
    • 0.091% fail on Speedometer
  • 0.091% fail on Seat belt installation check
    • 0.091% fail on Anchorages
  • 0.091% fail on Road Wheels
    • 0.091% fail on Attachment