Used car guide
2020 Mercedes-Benz GLB: petrol or diesel?
Petrol, diesel and hybrid versions go wrong in different ways, so each has its own figures from the MOTs these cars had during 2023–2025. Pick the one you’re looking at: the fuel is on the logbook and in the car’s MOT history.
Petrol
88% pass first time (all 2020 cars: 87%)
Nothing stands out above the usual rate
888 MOTsSee the petrol guide ›
Diesel
89% pass first time (all 2020 cars: 87%)
Nothing stands out above the usual rate
6,713 MOTsSee the diesel guide ›
Hybrid versions had too few MOTs for figures of their own, or weren’t sold.
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Other years
Every year of the Mercedes-Benz GLB compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2026 | – | Too new for MOT data |
| 2025 | – | Too new for MOT data |
| 2024 | – | Too new for MOT data |
| 2023 | 294 | Tyres 13% |
| 2022 | 5,424 | Tyres 20% |
| 2021 | 8,013 | Tyres 24% |