MERCEDES GLA (2017)
Running costs, reliability data, and common problems from 26,444 real MOT tests.
Annual Cost
£1,737
£145/month
MOT Pass Rate
88%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1595cc Petrol
Solid Option
88% pass rate, £1737/year to run. 6 points above average.
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Annual Running Costs
~42 mpg
Flat rate (post-2017)
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
Good reliability. Occasional issues but generally solid. That's 6 points above the national average of 82%.
At 9 years old, 88% of MERCEDES GLAs from 2017 passed their MOT first time in 2026. That's based on 26,444 tests across the UK. The average mileage at this age is 55,257 miles.
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How Does It Compare?
Mileage Analysis
55,257
Average miles
66,600
Expected for age
The average 2017 MERCEDES GLA has 55,257 miles on the clock, which is in line with the expected 66,600 miles for a 9-year-old car, suggesting normal everyday use.
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Best Year to Buy?
The most reliable year is the 2020 model with a 92% MOT pass rate, while the 2015 model has the lowest at 87%. The 2017 sits between the two at 88%.
MERCEDES GLA by Year
Similar Cars to Consider
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About the 2017 MERCEDES GLA
The 2017 MERCEDES GLA is a small family car with a 1595cc petrol engine. 26,444 of these vehicles were MOT tested in 2026, making it one of the most commonly tested cars on UK roads. Among all cars from 2017, the average MOT pass rate is 87%, and this model beats that benchmark.
With an average of 55,257 miles at 9 years old, MERCEDES GLA owners drive about as much as the UK average.
2017 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 £1,137 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2017 MERCEDES GLA?
Total estimated annual running cost is £1,737 (£145/month), broken down as £1137 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 88% pass rate. Keeping on top of servicing will help avoid surprises.
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 2017 MERCEDES GLA
At 9 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2020 model has the highest pass rate at 92%. With 26,444 MOT tests in our data, there's strong statistical confidence in these figures.
Common Issues to Watch For
Based on the 2017 MERCEDES GLA's fuel type, age, and engine size, these are the most likely problem areas to check.
Suspension Wear
Medium riskShock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.
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 2017 MERCEDES GLA stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES GLA(2017) | 88% | £1137 | £195 | Grp 12-25 | £1737 |
| VAUXHALL CORSA(2015) | 78% | £1137 | £30 | Grp 8-20 | £1722-£15 |
| FORD FOCUS(2015) | 85% | £1137 | £135 | Grp 12-25 | £1677-£60 |
| NISSAN QASHQAI(2017) | 86% | £955 | £190 | Grp 5-15 | £1550-£187 |
| VOLKSWAGEN POLO(2015) | 82% | £955 | £30 | Grp 5-15 | £1390-£347 |
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
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
VAUXHALL CORSA
2015 · 1398cc Petrol
FORD FOCUS
2015 · 1596cc Petrol
NISSAN QASHQAI
2017 · 1200cc Petrol
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