Mercedes-Benz A MOT reliability

Mercedes-Benz As passed their MOT first time 58% of the time across 12 tests in 2025.

Example photo of a Mercedes-Benz A — Photo: John Y. Can · CC BY 2.0 · Wikimedia Commons

These figures come from only 12 MOT tests. With so few cars, a single pass or fail changes the percentages a lot, so treat them as a rough guide rather than a true average.

First-time pass rate

58%

MOTs analysed

12

Still licensed (GB)

–

Body type

–

Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

2009 petrol

5 MOTs

Passed first time 60%. Typical mileage 59,414 (most between 54,516 and 82,811).

2011: 87% → 2012: 87% → 2013: 87% → 2014: 84% → 2015: 82% → 2016: 80% → 2017: 78% → 2018: 72% → 2019: 70% → 2020: 69% → 2021: 100% → 2022: 67% → 2023: 67% → 2024: 50% → 2025: 60%

Most common failures

Malfunction indicator lamp: inoperative or indicates a malfunction (20.0%)
Engine mounting condition: damaged or deteriorated resulting in excessive movement (20.0%)
Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt (20.0%)

Where 2009 As fail

Body, structure & corrosion

20.0%

Exhaust, emissions & leaks

20.0%

Looking at a particular car?

See its own MOT history, mileage and red flags, compared with these figures. Free.

Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.