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MOT reliability

Mercedes-benz 420 sl

1 vehicles · 19 completed MOT tests analysed
84%
MOT pass rate

Based on 1 Mercedes-benz 420 sl vehicles and 19 completed MOT tests, the Mercedes-benz 420 sl has an overall 84% pass rate, with an average recorded mileage of 69,530 miles.

1
Vehicles
19
MOT tests
933
Avg miles / year
1.2
Faults per test
0%
Dangerous-fault share

Mercedes-benz 420 sl problem areas

Where faults occur most across all Mercedes-benz 420 sl MOT tests:

  • Other35%
  • Brakes26%
  • Seatbelts & equipment17%
  • Tyres, wheels & suspension9%
  • Body & structure9%
  • Lamps & electrical4%
  • Emissions & nuisance4%

Mercedes-benz 420 sl pass rate by age

Age (years)TestsPass rate
161100%
18250%
191100%

Fuel types: Petrol (1)

Most common Mercedes-benz 420 sl MOT faults

These are the faults and advisories recorded most often across Mercedes-benz 420 sl MOT tests:

  1. Rear Exhaust has a minor leak of exhaust gases (7.1.2) (2 times)
  2. Front Exhaust has a minor leak of exhaust gases (7.1.2) (2 times)
  3. Nearside Front outer sill jacking point rusted and corroded (2 times)
  4. Offside Front sill jacking mounts rusted and corroded (2 times)
  5. Nearside Exhaust emissions hydrocarbon content excessive (7.3.B.1b) (1 times)
  6. Exhaust emits blue smoke during acceleration (7.3.A.2c) (1 times)
  7. Nearside Front wheel bearing has slight play (2.5.A.3c) (1 times)
  8. Nearside Side repeater not working (4.4.1 (a) (ii)) (1 times)
  9. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii)) (1 times)
  10. Front Brakes imbalanced requirements only just met. It would appear that the braking system requires adjustment or repair. (1.2.1 (b) (i)) (1 times)
  11. Front Service brake excessively fluctuating (1.2.1 (e)) (1 times)
  12. Nearside Front Brake hose bulging under pressure (1.1.12 (d)) (1 times)
  13. Nearside Front Service brake excessively binding (1.2.1 (f)) (1 times)
  14. Nearside Front Sub-frame pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i)) (1 times)
  15. Offside Front Brake hose bulging under pressure (1.1.12 (d)) (1 times)

Mercedes-benz 420 sl pass rate by registration year

YearVehiclesTestsPass rateAvg mileage
1989 1 19 84% 69,530

Mercedes-benz 420 sl reliability FAQ

Across 1 Mercedes-benz 420 sl vehicles in our MOT data, 84% pass the MOT (a 16% failure rate), with about 1.2 faults or advisories recorded per test.

The most frequently recorded Mercedes-benz 420 sl MOT issues are: Rear Exhaust has a minor leak of exhaust gases (7.1.2); Front Exhaust has a minor leak of exhaust gases (7.1.2); Nearside Front outer sill jacking point rusted and corroded.

The typical Mercedes-benz 420 sl in our data has covered around 69,530 miles.

Compare the Mercedes-benz 420 sl

See how the Mercedes-benz 420 sl stacks up against other Mercedes-benz models on MOT reliability:

420 sl vs C 420 sl vs E 420 sl vs Sprinter 420 sl vs A-class

Check a specific Mercedes-benz 420 sl

Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.

See all Mercedes-benz models · Learn about common MOT failures · what an MOT checks