Mercedes-Benz S-Class MOT Results

Registered in 1991
72.4% pass rate
from 572 tests in 2020
(22% better than other 1991 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 1991 cars and highlighted areas where the Mercedes-Benz S-Class is unusually good or bad.

  • 13% fail on Lamps, reflectors and electrical equipment
    • 4.0% fail on Headlamp aim
      • 4.0% fail on Headlamp aim
    • 3.3% fail on Stop lamp
    • 2.3% fail on Front and rear fog lamps
      • 2.3% fail on Rear fog lamp
        • 2.1% fail on Rear fog lamp
        • 0.35% fail on Switch
    • 1.9% fail on Direction indicators
      • 1.9% fail on Flashing type
        • 0.87% fail on Individual direction indicators
        • 0.52% fail on All direction indicators
        • 0.52% fail on Side repeaters
    • 1.7% fail on Position lamps
      • 1.7% fail on Position lamp
    • 1.6% fail on Headlamps
      • 1.0% fail on Headlamp (64% better than other 1991 cars)
      • 0.52% fail on Headlamp levelling device
    • 1.4% fail on Registration plate lamp(s)
    • 0.70% fail on Electrical equipment (72% better than other 1991 cars)
      • 0.52% fail on Horn
      • 0.17% fail on Trailer electrical socket
      • 0.17% fail on Battery(ies)
    • 0.52% fail on Hazard warning
      • 0.52% fail on Switch
    • 0.17% fail on Mandatory tell-tales
      • 0.17% fail on Rear fog lamp tell-tale
  • 9.4% fail on Brakes
    • 4.4% fail on Brake performance (46% better than other 1991 cars)
      • 2.8% fail on Service brake performance
        • 2.8% fail on Rbt
          • 2.6% fail on Service brake performance
          • 0.52% fail on Service brake imbalance
        • 0.17% fail on Decelerometer
          • 0.17% fail on Service brake performance
      • 1.9% fail on Service Brake Efficiency (sp)
        • 1.9% fail on Rbt (sp)
          • 1.6% fail on Service brake performance
          • 0.70% fail on Service brake imbalance
      • 1.0% fail on Parking brake efficiency (sp) (69% better than other 1991 cars)
        • 1.0% fail on Rbt (sp) (67% better than other 1991 cars)
      • 0.17% fail on Parking brake performance
        • 0.17% fail on Rbt
          • 0.17% fail on Parking brake performance
    • 2.3% fail on Rigid brake pipes
    • 1.7% fail on ABS / EBS / ESC (6 times worse than other 1991 cars)
      • 1.7% fail on Anti-lock braking system (6 times worse than other 1991 cars)
    • 1.2% fail on Mechanical brake components
      • 0.87% fail on Brake linings and pads
        • 0.87% fail on Brake pads
      • 0.52% fail on Brake discs and drums
        • 0.52% fail on Brake discs
    • 0.35% fail on Parking brake control
      • 0.35% fail on Lever
    • 0.35% fail on Hydraulic systems
      • 0.35% fail on Brake fluid
    • 0.35% fail on Flexible brake hoses
    • 0.35% fail on Load sensing valves
    • 0.17% fail on Brake actuators (including spring brakes or hydraulic cylinders)
      • 0.17% fail on Hydraulic brake cylinder
  • 7.7% fail on Suspension (31% better than other 1991 cars)
    • 2.1% fail on Suspension arms
      • 0.87% fail on Ball joint
      • 0.87% fail on Ball joint dust cover
      • 0.35% fail on Pins and bushes
    • 1.9% fail on Component mounting prescribed areas (58% better than other 1991 cars)
    • 1.7% fail on Springs
      • 1.7% fail on Coil springs
        • 1.7% fail on Coil spring
      • 0.17% fail on Spring mounting prescribed areas
    • 1.0% fail on Wheel bearings
    • 0.87% fail on Anti-roll bars
      • 0.35% fail on Attachment bracket and mounting
      • 0.17% fail on Pins and bushes
      • 0.17% fail on Linkage pins and bushes
      • 0.17% fail on Linkage ball joint dust cover
    • 0.70% fail on Shock absorbers
    • 0.35% fail on Axles
      • 0.17% fail on Axle
      • 0.17% fail on Swivel pins and bushes
    • 0.35% fail on Sub-frames
      • 0.17% fail on Sub-frame
      • 0.17% fail on Sub-frame mounting prescribed areas
    • 0.35% fail on Other suspension component
      • 0.17% fail on Pins and bushes
      • 0.17% fail on Ball joint
    • 0.17% fail on Suspension rods
      • 0.17% fail on Pins and bushes
  • 4.7% fail on Visibility
    • 2.6% fail on Wipers
    • 2.6% fail on Washers
    • 0.35% fail on Condition of glass
      • 0.17% fail on Windscreen
      • 0.17% fail on Window
  • 4.5% fail on Body, chassis, structure (54% better than other 1991 cars)
    • 2.4% fail on Exhaust system
    • 0.70% fail on Body
      • 0.35% fail on Panel
      • 0.35% fail on Other body component
    • 0.52% fail on Integral vehicle structure
      • 0.52% fail on Integral vehicle structure condition
    • 0.52% fail on Floor
    • 0.35% fail on Fuel system
      • 0.17% fail on Pipe
      • 0.17% fail on Fuel cap/sealing device
    • 0.35% fail on Seats
      • 0.17% fail on Driver's seat
      • 0.17% fail on Passenger's seat
    • 0.17% fail on Chassis
      • 0.17% fail on Chassis condition
    • 0.17% fail on Bumpers
    • 0.17% fail on Transmission
      • 0.17% fail on Prop shafts
        • 0.17% fail on Flexible couplings
  • 3.0% fail on Noise, emissions and leaks
    • 1.9% fail on Exhaust emissions
      • 1.9% fail on Spark ignition
        • 1.6% fail on Non catalyst emissions
        • 0.17% fail on Catalyst emissions
        • 0.17% fail on Emissions not tested
    • 0.87% fail on Fluid leaks
      • 0.52% fail on Transmission oil leaks (8 times worse than other 1991 cars)
      • 0.17% fail on Engine oil leaks
      • 0.17% fail on Other leaks
    • 0.17% fail on Noise suppression
      • 0.17% fail on Sound deadening material
  • 2.1% fail on Steering (59% better than other 1991 cars)
    • 2.1% fail on Steering linkage components
      • 1.6% fail on Track rod end
      • 0.52% fail on Drag link end
    • 0.17% fail on Power steering
      • 0.17% fail on Pump
  • 2.1% fail on Tyres
    • 1.2% fail on Condition
    • 1.0% fail on Tread depth
  • 1.6% fail on Seat belts and supplementary restraint systems
    • 1.6% fail on Seat belts
      • 0.87% fail on Condition
      • 0.35% fail on Prescribed areas (86% better than other 1991 cars)
      • 0.35% fail on Requirements
  • 0.87% fail on Identification of the vehicle
    • 0.87% fail on Registration plates
  • 0.17% fail on Speedometer and speed limiter
    • 0.17% fail on Speedometer
  • 0.17% fail on Road Wheels
    • 0.17% fail on Attachment

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