MERCEDES SLC 300 FINAL EDITION PREM A (2021)
Running costs, reliability data, and common problems from 102 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.
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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.
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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 5 years old, 92% of MERCEDES SLC 300 FINAL EDITION PREM As from 2021 passed their MOT first time in 2026. That's based on 102 tests across the UK. The average mileage at this age is 14,072 miles.
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How Does It Compare?
Mileage Analysis
14,072
Average miles
37,000
Expected for age
The average 2021 MERCEDES SLC 300 FINAL EDITION PREM A has 14,072 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.
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Best Year to Buy?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2021 model has the lowest at 92%. Consider a different year if reliability is a priority.
MERCEDES SLC 300 FINAL EDITION PREM A by Year
Similar Cars to Consider
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About the 2021 MERCEDES SLC 300 FINAL EDITION PREM A
The 2021 MERCEDES SLC 300 FINAL EDITION PREM A is a family car with a 1991cc petrol engine. 102 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 14,072 miles at 5 years old, MERCEDES SLC 300 FINAL EDITION PREM A 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 SLC 300 FINAL EDITION PREM A 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 SLC 300 FINAL EDITION PREM A?
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 SLC 300 FINAL EDITION PREM A
At 5 years old, the MERCEDES SLC 300 FINAL EDITION PREM A 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 2021 MERCEDES SLC 300 FINAL EDITION PREM A'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 SLC 300 FINAL EDITION PREM A stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES SLC 300 FINAL EDITION PREM A(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
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