Mercedes Gls
Reliability, running costs, and MOT data across 4 years from 4,597 real MOT tests.
Avg Pass Rate
92%
Total Tests
4,597
Best Year
2016 (93%)
Years Covered
4
How reliable is the Mercedes Gls?
Mercedes Gls by Year
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About the Mercedes Gls
The Mercedes Gls has been tested 4,597 times in 2024 MOT data across 4 model years (2016 to 2019), with an average pass rate of 92%. That's comfortably above the national average of 82%, making it a reliable choice. Available as diesel.
Best and Worst Years
The 2016 model is the most reliable with a 93% pass rate from 983 tests. The 2018 model has the lowest at 90%. With just a 3 point spread, the Gls is consistently reliable regardless of year.
Reliability Trend
The MERCEDES GLS has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Mileage Across Years
The oldest model in our data (2016) averages 72,875 miles, while the newest (2019) averages 48,209 miles.
Compared to the Mercedes brand average of 87%, the Gls performs 5 points better, making it one of the more reliable options in the Mercedes range.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.