Mercedes-Benz GLS: reliability by registration year
2017-2018 · 2 registration years · 1,115 first tests
Registration years
First-attempt MOT results for every GLS registration year with at least 500 first tests in 2025. Pass rates rise with newer cars, so read a year against its neighbours rather than against the top of the table. Years without their own report are listed here with the same figures.
| Year | First tests | First-attempt pass | Incl. PRS | Most common failure |
|---|---|---|---|---|
| 2018 | 531 | 85.5% | 86.8% | |
| 2017 | 584 | 89.0% | 89.7% |