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Mercedes-benz GLC - 2021

65.9 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 GLC, model year 2021. Sample size: 3,323 cars, 7,720 tests and 5,088 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 3,323 cars

The 2021 Mercedes-Benz GLC has an overall defect rate of 66 per 100 vehicles, which is significantly better than the average of 79 per 100 for cars of the same year, marking a reduction of 16%. Notably, it performs exceptionally well in several categories, with particularly low defect rates in steering, body structure, and lights and electrics, all showing improvements over the average. Mileage-related trends indicate that defects increase with mileage, but the GLC maintains a relatively stable performance across different mileage segments. Overall, this model stands out for its reliability compared to its peers.

Cars by mileage segment

Total: 3,323 cars

More model years for Mercedes-benz GLC

2015 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
▲ 20.5% better
31.8 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
▲ 85.7% better
0.1 faults / 100 tests
Year avg: 0.7 / 100 tests
Visibility
▲ 24.1% better
11.0 faults / 100 tests
Year avg: 14.5 / 100 tests
  • Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
  • Wiper blade: defective
Lights & Electrics
▲ 67.9% better
3.6 faults / 100 tests
Year avg: 11.2 / 100 tests
Wheels & Suspension
▲ 4.2% better
83.6 faults / 100 tests
Year avg: 87.3 / 100 tests
  • 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 cut in excess of the requirements deep enough to reach the ply or cords
  • Tyre tread depth not in accordance with the requirements
Body/Structure
▲ 85.7% better
0.3 faults / 100 tests
Year avg: 2.1 / 100 tests
Equipment
▲ 40.0% better
0.9 faults / 100 tests
Year avg: 1.5 / 100 tests
Other
▲ 81.5% better
0.5 faults / 100 tests
Year avg: 2.7 / 100 tests

Fault rate by mileage segment

Model    Year average
0 467 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: 2,107
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 627
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 477
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 241
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 236
Windscreen or window damaged or seriously discoloured: but not adversely affecting driver’s view
MINOR
Occurrences: 177
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 158
Wiper blade: defective
MINOR
Occurrences: 139
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 126
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 106

Serious faults (Top 10)

A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 158
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 106
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 81
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 55
Brake lining or pad: worn down to wear indicator
FAIL
Occurrences: 35
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 28
Wiper blade: missing or obviously not clearing the windscreen
FAIL
Occurrences: 25
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 16
The aim of a headlamp is not within limits laid down in the requirements
FAIL
Occurrences: 9
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 8