Mercedes M8
Reliability, estimated running costs, and MOT data across 3 model years from 318 MOT tests in 2024.
Avg Pass Rate
79%
Total Tests
318
Highest Pass Rate
2018 (79%)
Years Covered
3
About the Mercedes M8
The Mercedes M8 was MOT tested 318 times in 2024 (DVSA data, retests included) across 3 model years (2017 to 2019), with an average pass rate of 79%. That's close to the average of 82% across all models in our data. Our records list diesel versions.
Best and Worst Years
Of the years with at least 100 tests, the 2018 model has the highest pass rate at 79% from 111 tests. The 2017 model has the lowest at 76%. With just a 3 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Mileage Across Years
The oldest model in our data (2017) averages 239,453 miles, while the newest (2019) averages 165,230 miles. Older models have covered serious mileage, so suspension and drivetrain wear are worth checking.
Compared to the Mercedes brand average of 87%, the M8 is 8 points lower, placing it among the less reliable Mercedes models.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 2019 detailsHow reliable is the Mercedes M8?
Mercedes M8 by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Mercedes M8
Is the Mercedes M8 reliable?
Across its 3 model years in our data (2017 to 2019), the Mercedes M8 averages a 79% MOT pass rate, from 318 tests (DVSA MOT data for tests in 2024, retests included). That's 3 points below the average of 82% across all models in the same data. The 2018 model has the highest pass rate of the years with at least 100 tests, at 79%.
Which year Mercedes M8 has the best MOT pass rate?
Of the years with at least 100 tests, the 2018 Mercedes M8 has the highest MOT pass rate at 79%, while the 2017 model has the lowest at 76%, a 3 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
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