Mercedes-Benz Motor MOT reliability

Mercedes-Benz Motors passed their MOT first time 69% of the time across 392 tests in 2025.

First-time pass rate

69%

MOTs analysed

392

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 diesel

18 MOTs

These figures come from only 18 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.

Passed first time 78%. Typical mileage 46,619 (most between 36,719 and 62,009).

2011: 0% → 2012: 79% → 2013: 94% → 2014: 94% → 2015: 88% → 2016: 94% → 2017: 80% → 2018: 75% → 2019: 88% → 2020: 92% → 2021: 93% → 2022: 80% → 2023: 67% → 2024: 93% → 2025: 78%

Most common failures

Stop lamp: not working (5.6%)
Service brake imbalance: across an axle (5.6%)
Horn: not working (5.6%)
Service brake performance: excessively binding (5.6%)
Position lamp: not working (5.6%)

Where 2009 Motors fail

Brakes

16.7%

Lights & electrics

11.1%

Body, structure & corrosion

5.6%

Steering

5.6%

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.