Mercedes-Benz R350 MOT reliability

Mercedes-Benz R350s passed their MOT first time 81% of the time across 21 tests in 2025.

These figures come from 21 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

First-time pass rate

81%

MOTs analysed

21

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

2 MOTs

These figures come from only 2 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 50%. Typical mileage 102,530 (most between 90,034 and 115,026).

2012: 100% → 2013: 100% → 2014: 100% → 2015: 100% → 2016: 100% → 2017: 0% → 2018: 100% → 2019: 0% → 2020: 100% → 2021: 100% → 2022: 100% → 2023: 67% → 2024: 100% → 2025: 50%

Most common failures

SRS malfunction indicator lamp: warning lamp indicates a fault (50.0%)
Position lamp: not working (50.0%)
Stop lamp: not working (50.0%)

Where 2009 R350s fail

Lights & electrics

50.0%

Seat belts & other equipment

50.0%

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.