Mercedes-Benz B180 MOT reliability

Mercedes-Benz B180s passed their MOT first time 66% of the time across 100 tests in 2025.

First-time pass rate

66%

MOTs analysed

100

Still licensed (GB)

–

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

2009 petrol

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 50%. Typical mileage 90,122 (most between 78,253 and 102,427).

2011: 100% → 2012: 75% → 2013: 90% → 2014: 68% → 2015: 74% → 2016: 78% → 2017: 55% → 2018: 63% → 2019: 60% → 2020: 68% → 2021: 56% → 2022: 56% → 2023: 63% → 2024: 69% → 2025: 50%

Most common failures

Side repeaters: not working (16.7%)
Individual direction indicators: incorrect colour (11.1%)
Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt (5.6%)
Headlamp: reflector seriously defective (5.6%)
Ball joint excessively worn (5.6%)

2009 diesel

6 MOTs

These figures come from only 6 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 110,532 (most between 98,256 and 154,607).

2011: 100% → 2012: 85% → 2013: 89% → 2014: 92% → 2015: 80% → 2016: 78% → 2017: 86% → 2018: 67% → 2019: 22% → 2020: 50% → 2021: 75% → 2022: 86% → 2023: 29% → 2024: 60% → 2025: 50%

Most common failures

Stop lamp: not working (33.3%)
Coil spring: fractured or broken (33.3%)
Rbt (sp): efficiency below requirements (33.3%)
Headlamp aim: projected beam image is obviously incorrect (33.3%)
Headlamp aim: too low (33.3%)

Where 2009 B180s fail

Lights & electrics

38.9%

Suspension & axles

11.1%

Visibility & wipers

11.1%

Body, structure & corrosion

5.6%

Exhaust, emissions & leaks

5.6%

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.