MERCEDES GLA 250 AMG LINE PREMIUM AUTO (2021)
Running costs, reliability data, and common problems from 53 real MOT tests.
Annual Cost
£1,777
£148/month
MOT Pass Rate
92%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 18-32
1991cc Petrol
Great Choice
92% pass rate, £1777/year to run. 10 points above average.
Check a specific MERCEDES GLA 250 AMG LINE PREMIUM AUTO
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
Annual Running Costs
~36 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.
Get an insurance quote for this MERCEDES GLA 250 AMG LINE PREMIUM AUTO
Compare quotes and find the best deal
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 5 years old, 92% of MERCEDES GLA 250 AMG LINE PREMIUM AUTOs from 2021 passed their MOT first time in 2026. That's based on 53 tests across the UK. The average mileage at this age is 23,465 miles.
Got a MERCEDES GLA 250 AMG LINE PREMIUM AUTO you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
23,465
Average miles
37,000
Expected for age
The average 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO has 23,465 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Looking at a specific MERCEDES GLA 250 AMG LINE PREMIUM AUTO?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
Similar Cars to Consider
Check a Specific Mercedes Gla 250 amg line premium auto
Enter a reg plate to get the full MOT history, health score, and mileage verification.
Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.
About the 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO
The 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO is a family car with a 1991cc petrol engine. 53 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 23,465 miles at 5 years old, MERCEDES GLA 250 AMG LINE PREMIUM AUTO owners tend to use this car less than the typical driver.
2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO Fuel Costs
The 1991cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO?
Total estimated annual running cost is £1,777 (£148/month), broken down as £1327 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.
Buying a Used 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO
At 5 years old, the MERCEDES GLA 250 AMG LINE PREMIUM AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 53 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
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 2021 MERCEDES GLA 250 AMG LINE PREMIUM AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES GLA 250 AMG LINE PREMIUM AUTO(2021) | 92% | £1327 | £195 | Grp 18-32 | £1777 |
| VOLKSWAGEN GOLF(2019) | 92% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| NISSAN QASHQAI(2020) | 93% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| MINI COOPER(2019) | 92% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| HYUNDAI TUCSON(2019) | 90% | £1137 | £190 | Grp 12-25 | £1582-£195 |
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
VOLKSWAGEN GOLF
2019 · 1498cc Petrol
NISSAN QASHQAI
2020 · 1598cc Petrol
MINI COOPER
2019 · 1499cc Petrol
Related Guides
In-depth articles relevant to the Mercedes Gla 250 amg line premium auto.
Cars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Running CostsCheapest Cars to Run in 2026: Real Data from 19.8 Million MOT Tests
9 min read
Reliability20 Most Reliable Used Cars UK 2026: Real MOT Pass Rate Rankings
10 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Problems: 7 Issues Owners Report (2026)
13 min read
Check a specific MERCEDES GLA 250 AMG LINE PREMIUM AUTO
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a MERCEDES GLA 250 AMG LINE PREMIUM AUTO? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
Competitors charge £10-£20 for the same data