Mercedes-Benz C-Class MOT reliability

Mercedes-Benz C-Classs passed their MOT first time 82% of the time across 184 tests in 2025. 705 are still licensed in Great Britain.

First-time pass rate

82%

MOTs analysed

184

Still licensed (GB)

705

Body type

Sedan

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

2018 diesel

8 MOTs

These figures come from only 8 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 100%. Typical mileage 51,984 (most between 43,660 and 78,659).

2021: 86% → 2022: 80% → 2023: 100% → 2024: 89% → 2025: 100%

Most common failures

2018 petrol

8 MOTs

These figures come from only 8 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 63%. Typical mileage 53,074 (most between 41,831 and 67,240).

2021: 100% → 2022: 100% → 2023: 80% → 2024: 71% → 2025: 63%

Most common failures

Tyre pressure monitoring system: malfunctioning or obviously inoperative (12.5%)
Malfunction indicator lamp: inoperative or indicates a malfunction (12.5%)
Condition: has a tear, caused by separation or partial failure of its structure (12.5%)

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.