Mercedes-Benz M8 MOT reliability

Mercedes-Benz M8s passed their MOT first time 63% of the time across 216 tests in 2025.

First-time pass rate

63%

MOTs analysed

216

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

2017 diesel

92 MOTs

These figures come from 92 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

Passed first time 62%. Typical mileage 257,019 (most between 216,064 and 292,603).

2017: 100% → 2018: 94% → 2019: 90% → 2020: 87% → 2021: 79% → 2022: 66% → 2023: 66% → 2024: 65% → 2025: 62%

Most common failures

Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt (8.7%)
Service brake performance: excessively binding (7.6%)
Coil spring: fractured or broken (5.4%)
Ball joint dust cover no longer prevents the ingress of dirt (3.3%)
Rbt (sp): efficiency less than 50% of the required value (3.3%)

Where 2017 M8s fail

Suspension & axles

20.7%

Brakes

14.1%

Body, structure & corrosion

6.5%

Lights & electrics

6.5%

Wheels & tyres

5.4%

Exhaust, emissions & leaks

5.4%

Seat belts & other equipment

3.3%

Visibility & wipers

3.3%

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.