2015 Mercedes-Benz GLC MOT pass rate: 84.7% (3,973 tests)

2015-registered Mercedes-Benz GLCs passed 84.7% of 3,973 MOT tests in 2023–2025 — 6.0 points better than all UK cars registered in 2015 (78.7%). This is one of the strongest GLC years in the age-adjusted MOT ranking, although the individual car still matters more.

84.7%Pass rate, 2015 cars

106.0Age-adjusted index (100 = average)

3,973Tests analysed

73,563 miMedian mileage at test

77.8% / 84.8%Petrol vs diesel pass rate

Is the 2015 GLC getting worse?

Pass rate of 2015-registered cars across recent test years:

Test year	Pass rate
2023	85.3% +4.7 vs same-age
2024	84.2% +5.7 vs same-age
2025	84.7% +7.6 vs same-age

The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.

What fails on a 2015 GLC

#	System	Defects recorded	Share
1	Suspension	349	34.1%
2	Tyres	284	27.7%
3	Brakes	140	13.7%
4	Noise, emissions and leaks	70	6.8%
5	Visibility	61	6.0%
6	Body, chassis, structure	45	4.4%

All GLC years compared

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2015 (this page)	3,973	84.7%	+6.0 pts	73,563
2016	27,306	86.2%	+4.8 pts	68,274
2017	37,380	86.9%	+2.9 pts	58,748
2018	56,380	87.7%	+1.4 pts	48,279
2019	43,500	90.1%	+1.7 pts	39,649
2020	13,340	91.7%	+1.8 pts	34,064
2021	5,628	92.8%	+2.3 pts	32,714
2022	2,854	92.5%	+1.3 pts	27,202

Weighing up which year to buy? See the full ranking: Mercedes-Benz GLC years to avoid.

Buying a 2015 GLC? Two checks first

Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

FAQs

Is a 2015 Mercedes-Benz GLC reliable?

2015-registered examples passed 84.7% of their MOT tests (3,973 tests, 2023–2025), +6.0 points versus all UK cars registered in the same year. At roughly 11 years old with a median 73,563 miles, condition now varies car by car — always check the individual MOT history.

What mileage is too high for a 2015 GLC?

The median tested example shows 73,563 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.

Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.