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Mercedes-benz S-CLASS - 2018

61.1 faults per 100 tests
Year average for all cars of 2018 is 123.2 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 2018. Sample size: 2,692 cars, 6,965 tests and 4,258 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 2,692 cars

The 2018 Mercedes-Benz S-Class shows a significantly lower overall defect rate of 61 per 100 vehicles compared to the average of 120 per 100, marking a reduction of 49%. Notably, this model excels in several categories such as brakes, steering, and lights, where it performs considerably better than average, particularly in steering with only 1% of vehicles having defects compared to the 4% average. Mileage trends indicate that defect rates increase with mileage, but the S-Class maintains a lower defect rate across all mileage segments compared to the average. Overall, it demonstrates strong reliability in critical areas, making it a standout choice in its class.

Cars by mileage segment

Total: 2,692 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
▲ 57.0% better
29.6 faults / 100 tests
Year avg: 68.8 / 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
▲ 88.0% better
0.6 faults / 100 tests
Year avg: 5.0 / 100 tests
Visibility
▲ 46.8% better
7.4 faults / 100 tests
Year avg: 13.9 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
Lights & Electrics
▲ 81.3% better
3.3 faults / 100 tests
Year avg: 17.6 / 100 tests
Wheels & Suspension
▲ 40.4% better
75.5 faults / 100 tests
Year avg: 126.7 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A suspension pin, bush, joint or bearing: excessively worn
  • 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
  • Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 72.5% better
1.4 faults / 100 tests
Year avg: 5.1 / 100 tests
Equipment
▲ 63.6% better
0.8 faults / 100 tests
Year avg: 2.2 / 100 tests
Other
▲ 50.0% better
3.5 faults / 100 tests
Year avg: 7.0 / 100 tests

Fault rate by mileage segment

Model    Year average
0 307 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: 1,407
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 394
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 343
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 329
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 278
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 160
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 152
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 137
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 120
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 104

Serious faults (Top 10)

Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 120
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 104
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 101
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 54
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 30
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 29
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 28
Any fracture or welding defect on a wheel
FAIL
Occurrences: 22
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 17
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 11