Mercedes-Benz C300 MOT reliability

Mercedes-Benz C300s passed their MOT first time 87% of the time across 173 tests in 2025.

First-time pass rate

87%

MOTs analysed

173

Still licensed (GB)

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Body type

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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

2020 hybrid

1 MOT

These figures come from only 1 MOT test. 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 0%. Typical mileage 30,176 (most between 30,176 and 30,176).

2023: 100% → 2024: 100% → 2025: 0%

Most common failures

Condition: fractured (100.0%)
Condition: has a bulge, caused by separation or partial failure of its structure (100.0%)

2020 petrol

1 MOT

These figures come from only 1 MOT test. 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 100%. Typical mileage 48,721 (most between 48,721 and 48,721).

2024: 100% → 2025: 100%

Most common failures

Where 2020 C300s fail

Wheels & tyres

100.0%

Looking at a particular car?

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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.