MERCEDES A 180 SE D (2020)
Running costs, reliability data, and common problems from 292 real MOT tests.
Annual Cost
£1,355
£113/month
MOT Pass Rate
92%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1461cc Diesel
Great Choice
92% pass rate, £1355/year to run. 10 points above average.
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Annual Running Costs
~55 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 92% of MERCEDES A 180 SE Ds from 2020 passed their MOT first time in 2026. That's based on 292 tests across the UK. The average mileage at this age is 43,575 miles.
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How Does It Compare?
Mileage Analysis
43,575
Average miles
44,400
Expected for age
The average 2020 MERCEDES A 180 SE D has 43,575 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.
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Best Year to Buy?
The most reliable year is the 2019 model with a 98% MOT pass rate, while the 2020 model has the lowest at 92%. Consider a different year if reliability is a priority.
MERCEDES A 180 SE D by Year
Similar Cars to Consider
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About the 2020 MERCEDES A 180 SE D
The 2020 MERCEDES A 180 SE D is a small family car with a 1461cc diesel engine. 292 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 43,575 miles at 6 years old, MERCEDES A 180 SE D owners drive about as much as the UK average.
2020 MERCEDES A 180 SE D Fuel Costs
The 1461cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2020 MERCEDES A 180 SE D?
Total estimated annual running cost is £1,355 (£113/month), broken down as £905 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES A 180 SE D Reliability Trend
Older MERCEDES A 180 SE Ds tend to have better MOT pass rates than newer ones, with an average decline of 5 percentage points across model years.
Buying a Used 2020 MERCEDES A 180 SE D
At 6 years old, the MERCEDES A 180 SE D offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2020 MERCEDES A 180 SE D's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Watch outExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2020 MERCEDES A 180 SE D stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES A 180 SE D(2020) | 92% | £905 | £195 | Grp 12-25 | £1355 |
| FORD FOCUS(2019) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
| MERCEDES A(2019) | 91% | £905 | £190 | Grp 12-25 | £1350-£5 |
| MERCEDES A-CLASS(2018) | 89% | £905 | £190 | Grp 12-25 | £1500+£145 |
| VOLKSWAGEN POLO(2018) | 84% | £905 | £190 | Grp 12-25 | £1500+£145 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Mercedes Models
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