Mercedes A

Reliability, estimated running costs, and MOT data across 10 model years from 188,823 MOT tests in 2024.

Avg Pass Rate

88%

Total Tests

188,823

Highest Pass Rate

2021 (94%)

Years Covered

About the Mercedes A

The Mercedes A was MOT tested 188,823 times in 2024 (DVSA data, retests included) across 10 model years (2013 to 2022), with an average pass rate of 88%. That's comfortably above the average of 82% across all models in our data. Our records list diesel and petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2021 model has the highest pass rate at 94% from 37,477 tests. The 2017 model has the lowest at 87%. The 7 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer Mercedes As pass their MOT more often than older ones, by 5 percentage points on average, which is mostly down to age and wear.

Mileage Across Years

The oldest model in our data (2013) averages 69,440 miles, while the newest (2022) averages 24,036 miles.

Estimated Running Costs

Fuel (Diesel, 1950cc)

£1,397

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£1,852

Per month£154/mo

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 2022 details

How reliable is the Mercedes A?

vs average of all models+6% (82% avg)

vs Mercedes brand average+1% (87% avg)

Best to worst year spread7 percentage points

Reliability trendImproving over years

Mercedes A by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2022	94%	134	24,036 mi
2021	94%	37,477	26,277 mi
2020	93%	59,637	32,588 mi
2019	91%	89,588	40,548 mi
2018	89%	1,663	46,341 mi
2017	87%	100	57,562 mi
2016	87%	91	58,350 mi
2015	86%	36	86,896 mi
2014	74%	43	70,742 mi
2013	87%	54	69,440 mi

Questions about the Mercedes A

Is the Mercedes A reliable?

Across its 10 model years in our data (2013 to 2022), the Mercedes A averages an 88% MOT pass rate, from 188,823 tests (DVSA MOT data for tests in 2024, retests included). That's 6 points above the average of 82% across all models in the same data. The 2021 model has the highest pass rate of the years with at least 100 tests, at 94%.

Which year Mercedes A has the best MOT pass rate?

Of the years with at least 100 tests, the 2021 Mercedes A has the highest MOT pass rate at 94%, while the 2017 model has the lowest at 87%, a 7 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.