Mercedes B
Reliability, running costs, and MOT data across 5 years from 14,226 real MOT tests.
Avg Pass Rate
95%
Total Tests
14,226
Best Year
2022 (100%)
Years Covered
5
About the Mercedes B
The Mercedes B has been tested 14,226 times in 2026 MOT data across 5 model years (2018 to 2022), with an average pass rate of 95%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol and diesel.
Best and Worst Years
The 2022 model is the most reliable with a 100% pass rate from 34 tests. The 2018 model has the lowest at 91%. The 9 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
The MERCEDES B has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Mileage Across Years
The oldest model in our data (2018) averages 36,999 miles, while the newest (2022) averages 23,239 miles.
Compared to the Mercedes brand average of 87%, the B performs 8 points better, making it one of the more reliable options in the Mercedes range.
Estimated Running Costs
Based on 7,400 miles/year, current fuel prices, and MOT pass rate data. Insurance not included.
Full 2022 detailsHow reliable is the Mercedes B?
Mercedes B by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
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