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Mercedes-benz GLS - 2021

70.0 faults per 100 tests
Year average for all cars of 2021 is 80.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz GLS, model year 2021. Sample size: 375 cars, 998 tests and 699 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 375 cars

The 2021 Mercedes-Benz GLS has an overall defect rate of 70 defects per 100 vehicles, which is lower than the yearly average of 79 defects per 100, representing a 10.9% improvement. Notably, it performs significantly better than average in the areas of brakes, lights and electrics, and other defects, with reductions of 22.8%, 57.8%, and 52.9% respectively compared to the average car of the same year. In terms of mileage, the defect rate tends to increase with higher mileage brackets, particularly noticeable in the 62,000 to 93,000 miles range, where both the model and the average show high defect counts. Overall, the GLS stands out for its reliability in key safety and electrical components, making it a strong choice in its category.

Cars by mileage segment

Total: 375 cars

More model years for Mercedes-benz GLS

2016 2017 2018 2019 2020 2021 2022

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
▲ 26.3% better
29.5 faults / 100 tests
Year avg: 40.0 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: significantly and obviously worn
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
Steering
▲ 14.3% better
0.6 faults / 100 tests
Year avg: 0.7 / 100 tests
Visibility
▲ 13.1% better
12.6 faults / 100 tests
Year avg: 14.5 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
Lights & Electrics
▲ 58.9% better
4.6 faults / 100 tests
Year avg: 11.2 / 100 tests
Wheels & Suspension
▲ 0.1% better
87.2 faults / 100 tests
Year avg: 87.3 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • 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
▲ 23.8% better
1.6 faults / 100 tests
Year avg: 2.1 / 100 tests
Equipment
▼ 6.7% worse
1.6 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 55.6% better
1.2 faults / 100 tests
Year avg: 2.7 / 100 tests

Fault rate by mileage segment

Model    Year average
0 268 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: 265
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 80
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 41
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 37
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 33
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 29
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 27
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 26
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 22
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 19

Serious faults (Top 10)

Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 37
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 33
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 29
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 7
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 6
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 5
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 4
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 4
Seat belt buckle missing, damaged or not functioning as intended
FAIL
Occurrences: 3
Any fracture or welding defect on a wheel
FAIL
Occurrences: 3