MERCEDES AMG GT BLACK SERIES AUTO (2021)
Running costs, reliability data, and common problems from 30 real MOT tests.
Annual Cost
£2,342
£195/month
MOT Pass Rate
73%
Average
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
3982cc Petrol
Check Carefully
73% pass rate, £2342/year to run. 9 points below average.
Check a specific MERCEDES AMG GT BLACK SERIES 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
~30 mpg
Flat rate (post-2017)
Higher estimate due to low pass rate
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 AMG GT BLACK SERIES AUTO
Compare quotes and find the best deal
Reliability Verdict
Average reliability. Expect some repairs as it ages. That's 9 points below the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 5 years old, 73% of MERCEDES AMG GT BLACK SERIES AUTOs from 2021 passed their MOT first time in 2026. That's based on 30 tests across the UK. The average mileage at this age is 2,940 miles.
Got a MERCEDES AMG GT BLACK SERIES 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
2,940
Average miles
37,000
Expected for age
The average 2021 MERCEDES AMG GT BLACK SERIES AUTO has 2,940 miles on the clock, which is significantly below the expected 37,000 miles for a 5-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
Looking at a specific MERCEDES AMG GT BLACK SERIES 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 Amg gt black series 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 AMG GT BLACK SERIES AUTO
The 2021 MERCEDES AMG GT BLACK SERIES AUTO is a performance with a 3982cc petrol engine. 30 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 100% of 2021 cars for MOT pass rates.
With an average of 2,940 miles at 5 years old, MERCEDES AMG GT BLACK SERIES AUTO owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2021 MERCEDES AMG GT BLACK SERIES AUTO Fuel Costs
The 3982cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 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 AMG GT BLACK SERIES AUTO?
Total estimated annual running cost is £2,342 (£195/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 73% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2021 MERCEDES AMG GT BLACK SERIES AUTO
At 5 years old, the MERCEDES AMG GT BLACK SERIES 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 30 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 MERCEDES AMG GT BLACK SERIES AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
Oil Consumption
Low riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
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 AMG GT BLACK SERIES AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES AMG GT BLACK SERIES AUTO(2021) | 73% | £1592 | £195 | Grp 35-50 | £2342 |
| MERCEDES C(2019) | 91% | £1592 | £190 | Grp 35-50 | £2037-£305 |
| PORSCHE CAYENNE(2019) | 95% | £1592 | £190 | Grp 35-50 | £2037-£305 |
| PORSCHE 911(2019) | 97% | £1592 | £190 | Grp 35-50 | £2037-£305 |
| AUDI A6(2020) | 94% | £1592 | £190 | Grp 35-50 | £2037-£305 |
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
MERCEDES C
2019 · 3982cc Petrol
PORSCHE CAYENNE
2019 · 3996cc Petrol
PORSCHE 911
2019 · 3996cc Petrol
Related Guides
In-depth articles relevant to the Mercedes Amg gt black series 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
Running CostsCheapest Cars to Insure in the UK: Insurance Groups 1-10
9 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 AMG GT BLACK SERIES AUTO
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a MERCEDES AMG GT BLACK SERIES 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