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Mercedes-benz S-CLASS - 2020

60.4 faults per 100 tests
Year average for all cars of 2020 is 91.3 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz S-CLASS, model year 2020. Sample size: 268 cars, 704 tests and 425 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 268 cars

The 2020 Mercedes-Benz S-Class shows a notably lower overall defect rate of 60 per 100 vehicles, which is 33% better than the yearly average of 90 defects per 100 vehicles. While tyre wear issues are common across many vehicles, this model excels in several categories, particularly in brakes, steering, and lights, with defect rates significantly lower than the average. Mileage-related trends indicate that the defect rate increases with higher mileage, but the S-Class maintains a relatively consistent performance across different mileage brackets. Additionally, it stands out positively in areas such as body integrity and equipment, where it shows dramatically fewer defects compared to the average car.

Cars by mileage segment

Total: 268 cars

More model years for Mercedes-benz S-CLASS

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

Other models from Mercedes-benz

Mercedes-benz 190 E Mercedes-benz 300 Mercedes-benz A Mercedes-benz A 180 AMG LINE Mercedes-benz A 180 SPORT Mercedes-benz A 200 Mercedes-benz A 250 AMG LINE Mercedes-benz A-CLASS Mercedes-benz B Mercedes-benz B-CLASS Mercedes-benz C Mercedes-benz CITAN Mercedes-benz CL Mercedes-benz CL 500 Mercedes-benz CLA Mercedes-benz CLC Mercedes-benz CLK Mercedes-benz CLS Mercedes-benz E Mercedes-benz E 220 AMG Mercedes-benz EQA 250 AMG LINE Mercedes-benz EQC 400 AMG LINE Mercedes-benz ESPRINTER Mercedes-benz EVITO Mercedes-benz G Mercedes-benz G-CLASS Mercedes-benz GL Mercedes-benz GLA Mercedes-benz GLA 180 AMG LINE Mercedes-benz GLA 200 AMG LINE Mercedes-benz GLA 250 AMG LINE Mercedes-benz GLA 250 EXCLUSIVE Mercedes-benz GLB 200 AMG LINE Mercedes-benz GLB 220 AMG LINE Mercedes-benz GLC Mercedes-benz GLC 300 AMG Mercedes-benz GLC 300 AMG LINE Mercedes-benz GLE Mercedes-benz GLS Mercedes-benz GT Mercedes-benz ML Mercedes-benz R-Class Mercedes-benz S-Class Mercedes-benz SL Mercedes-benz SLC Mercedes-benz SLK Mercedes-benz SPRINTER Mercedes-benz V Mercedes-benz VIANO Mercedes-benz VITO Mercedes-benz X

Categories

Brakes
▲ 44.7% better
28.1 faults / 100 tests
Year avg: 50.8 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 100.0% better
0.0 faults / 100 tests
Year avg: 1.5 / 100 tests
Visibility
▲ 17.7% better
11.6 faults / 100 tests
Year avg: 14.1 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
Lights & Electrics
▲ 79.5% better
2.3 faults / 100 tests
Year avg: 11.2 / 100 tests
Wheels & Suspension
▲ 21.3% better
76.7 faults / 100 tests
Year avg: 97.5 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A wheel: badly distorted or wear between wheel and hub at spigot mounting
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 87.5% better
0.3 faults / 100 tests
Year avg: 2.4 / 100 tests
Equipment
▲ 60.0% better
0.6 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 70.3% better
1.1 faults / 100 tests
Year avg: 3.7 / 100 tests

Fault rate by mileage segment

Model    Year average
0 273 0–31,000 mi 31,000–62,000 62,000–93,000 93,000–124,000 124,000+
* Metric: faults per 100 tests.

Most common faults (Top 10)

Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 153
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 50
A wheel: badly distorted or wear between wheel and hub at spigot mounting
ADVISORY
Occurrences: 30
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 29
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 19
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 19
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 17
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 15
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 15
Wiper blade: defective
MINOR
Occurrences: 15

Serious faults (Top 10)

A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 15
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 6
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 4
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 4
A direction indicator: lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
FAIL
Occurrences: 2
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 2
Any fracture or welding defect on a wheel
FAIL
Occurrences: 2
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 2
Brake fluid contaminated
FAIL
Occurrences: 1
5.2.3 (i) (i)
FAIL
Occurrences: 1