Does the Mercedes-Benz CLA fail the MOT on seat belts and airbags more than it should?

The Mercedes-Benz CLA records 0.89 seat belts and airbags failure items per 100 initial MOT tests (2019–2024), against 0.34 expected for a car of the same age mix: more than expected for its class and age (+0.55, 95% interval +0.52 to +0.59). It ranks 142 of 627 models on seat belts and airbags (1 = most failures above expected).

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on seat belts and airbags · check a Mercedes-Benz CLA by registration

What exactly fails on seat belts and airbags?

The most frequent DVSA defect wording in this group on the Mercedes-Benz CLA is “An SRS malfunction indicator lamp (MIL) indicates a system malfunction”, recorded 1,955 times in 2019–2024.

Mercedes-Benz CLA: most frequent seat belts and airbags defect wordings, 2019–2024 (30+ items each)
DVSA defect wording	Items	Per 100 tests
An SRS malfunction indicator lamp (MIL) indicates a system malfunction	1,955	0.75
Seat belt buckle missing, damaged or not functioning as intended	125	0.05
An airbag obviously inoperative	101	0.04
Seat belt not functioning as intended or of an incorrect type	52	0.02

Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 260,294 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does the Mercedes-Benz CLA fail the MOT on seat belts and airbags more than it should?

What exactly fails on seat belts and airbags?

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