Does the Mercedes-Benz GLS fail the MOT on lamps, reflectors and electrics more than it should?

The Mercedes-Benz GLS records 1.15 lamps, reflectors and electrics failure items per 100 initial MOT tests (2019–2024), against 3.73 expected for a car of the same age mix: less than expected for its class and age (−2.58, 95% interval −2.94 to −2.22). It ranks 429 of 729 models on lamps, reflectors and electrics (1 = most failures above expected).

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

No single lamps, reflectors and electrics defect wording reaches 30 items on the Mercedes-Benz GLS; the failures are spread across several.