Does the Mercedes-Benz GLS fail the MOT on noise, emissions and leaks more than it should?

The Mercedes-Benz GLS records 0.47 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 0.84 expected for a car of the same age mix: about as expected for its class and age (the difference is within its interval or under 0.5 items per 100 tests) (−0.37, 95% interval −0.54 to −0.20). It ranks 341 of 678 models on noise, emissions and leaks (1 = most failures above expected).

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on noise, emissions and leaks · check a Mercedes-Benz GLS by registration