Mercedes GLA (2020)
Estimated running costs and MOT pass rates from 2,329 MOT tests in 2024.
Annual Cost
£1,853
£154/month
MOT Pass Rate
92%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 12-25
1595cc Petrol
Great Choice
92% pass rate, £1,853/year to run. 10 points above average.
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Annual Running Costs
~42 mpg
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 10 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.
92% of MOT tests on Mercedes GLAs from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 2,329 tests across the UK, retests included. The average mileage recorded at those tests was 29,861 miles.
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How Does It Compare?
Mileage Analysis
29,861
Average miles
29,600
Expected for age
The average 2020 Mercedes GLA had 29,861 miles on the clock at its 2024 MOT, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.
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Mercedes GLA by Year
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About the 2020 Mercedes GLA
The 2020 Mercedes GLA is a premium car. Our records list a 1595cc petrol engine, though engines vary between versions. 2,329 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. Among all models from 2020, the average MOT pass rate is 92%, and this model matches that benchmark.
With an average of 29,861 miles recorded at its 2024 MOT tests, Mercedes GLA owners drive about as much as the UK average.
2020 Mercedes GLA Fuel Costs
The 1595cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,398 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2020 Mercedes GLA?
Total estimated annual running cost is £1,853 (£154/month), broken down as £1,398 fuel, £200 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 GLA Reliability Trend
The Mercedes GLA has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2020 Mercedes GLA
At 6 years old, the Mercedes GLA 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
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
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 GLA stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Mercedes GLA(2020) | 92% | £1,398 | £200 | Grp 12-25 | £1,853 |
| Volkswagen Golf(2019) | 92% | £1,398 | £200 | Grp 12-25 | £1,853same |
| Vauxhall Corsa(2018) | 85% | £1,398 | £200 | Grp 8-20 | £2,003+£150 |
| Nissan Qashqai(2018) | 87% | £1,175 | £200 | Grp 5-15 | £1,780-£73 |
| Ford Kuga(2018) | 90% | £1,398 | £200 | Grp 12-25 | £1,853same |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2020 Mercedes GLA
Is the 2020 Mercedes GLA reliable?
Excellent reliability. Very few MOT failures. 92% of MOT tests on 2020 Mercedes GLAs ended in a pass, from 2,329 tests (DVSA MOT data for tests in 2024, retests included). That's 10 points above the average of 82% across all models in the same data.
How much does a 2020 Mercedes GLA cost to run?
Our estimate is £1,853 a year (£154 a month): £1,398 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2020 Mercedes GLA?
92% of 2,329 MOT tests on the 2020 Mercedes GLA ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1247th of 2,554 models first registered in 2020 (top half).
Which year Mercedes GLA has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Mercedes GLA has the highest MOT pass rate at 92% and the 2015 the lowest at 87%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2020 Mercedes GLA?
The average mileage recorded at MOT tests on the 2020 Mercedes GLA is 29,861 miles, which is in line with the expected 29,600 miles for a 4-year-old car, suggesting normal everyday use.
Related Mercedes Models
Explore other Mercedes cars or similar models in the same category.
Mercedes A
2019 · 1461cc Diesel
Mercedes C
2017 · 1991cc Hybrid
Mercedes A-Class
2017 · 1461cc Diesel
Volkswagen Golf
2019 · 1498cc Petrol
Vauxhall Corsa
2018 · 1398cc Petrol
Nissan Qashqai
2018 · 1200cc Petrol
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