Mercedes-Benz Gls MOT pass rate: 87.8% (1,868 tests, 2025)

The Mercedes-Benz Gls passed 87.8% of its 1,868 MOT tests in 2025 — 10.3 points above the UK average of 77.5%. The median tested example was 8 years old with 65,897 miles on the clock.

87.8%Pass rate (2025)

1,868MOT tests analysed

65,897 miMedian mileage at test

8 yrsMedian age at test

How the Gls compares

Mercedes-Benz Gls

87.8%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Mercedes-Benz average (all models)

80.7%

What fails most on the Mercedes-Benz Gls

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the Gls:

#	System	Defects recorded	Share
1	Tyres	207	100.0%

Pre-MOT checklist for Gls owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory

Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

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

Gls pass rate by registration year

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2017	1,872	90.0%	+6.0 pts	62,036
2018	1,693	87.8%	+1.4 pts	51,517

Check a specific Gls before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Mercedes-Benz models

C78.2% pass rate · 343,551 tests A-Class77.8% pass rate · 232,671 tests E79.7% pass rate · 215,896 tests A89.1% pass rate · 93,733 tests Vito73.4% pass rate · 81,263 tests GLC87.2% pass rate · 65,847 tests GLA83.1% pass rate · 64,404 tests CLA82.7% pass rate · 62,279 tests

FAQs

What is the MOT pass rate for a Mercedes-Benz Gls?

In 2025, 87.8% of 1,868 first MOT tests on the Mercedes-Benz Gls were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Gls fail its MOT on most?

Lighting, tyres and suspension dominate failures across comparable models.

Is the Mercedes-Benz Gls reliable?

MOT pass rate is one lens on durability: at 87.8% it performs above the national average at a median age of 8 years and 65,897 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.