What year Mercedes-Benz Gls is most reliable?

Based on MOT first-test pass rates, the 2017 Mercedes-Benz Gls has the highest pass rate at 91.6%, out of 786 vehicles tested.

What are the most common Mercedes-Benz Gls MOT failures?

The most common Mercedes-Benz Gls MOT failures vary by year. Check the individual year pages for detailed defect breakdowns — links in the table above.

CarHunch

Get Started

Mercedes-Benz Gls — Reliability by Year

2,286 vehicles · MOT data 2016–2019 · first-test pass rates

This page shows MOT first-test pass rates for each year the Mercedes-Benz Gls was manufactured — click any year to explore that cohort in detail. Trying to decide which year to buy? See the full buying guide →

✓

Best pass rate year

2017

91.6% pass rate · 786 vehicles

⚠

Lowest pass rate year

2016

89.6% pass rate · 482 vehicles

Year	Pass rate	Avg mileage	Vehicles
2019	91.5%	38,084 mi	373
2018	90.4%	42,178 mi	645
2017	91.6%	47,526 mi	786
2016	89.6%	52,566 mi	482

Which year Mercedes-Benz Gls is most reliable?

MOT pass rate by year of manufacture — averaged across each vehicle's lifetime of tests.

Tests range from an average of 38,084 miles (newest year) to 52,566 miles (oldest year). Older years naturally accumulate more tests at higher mileages — see the mileage-normalised breakdown →

Trying to decide which year to buy?

We've done the full analysis — which years to look for, which to avoid, and where to find the best value for reliability on a Mercedes-Benz Gls.

See the buying guide →

← All Mercedes-Benz models

Check any UK registration — free MOT history and risk insights.