Mercedes AMG C 43 Edition Prem + 4M A (2021)
Estimated running costs and MOT pass rates from 448 MOT tests in 2024.
Annual Cost
£2,413
£201/month
MOT Pass Rate
94%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 30-42
2996cc Petrol
Great Choice
94% pass rate, £2,413/year to run. 12 points above average.
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Annual Running Costs
~30 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 12 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.
94% of MOT tests on Mercedes AMG C 43 Edition Prem + 4M As from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 448 tests across the UK, retests included. The average mileage recorded at those tests was 25,428 miles.
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How Does It Compare?
Mileage Analysis
25,428
Average miles
22,200
Expected for age
The average 2021 Mercedes AMG C 43 Edition Prem + 4M A had 25,428 miles on the clock at its 2024 MOT, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
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Mercedes AMG C 43 Edition Prem + 4M A by Year
Similar Cars to Consider
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About the 2021 Mercedes AMG C 43 Edition Prem + 4M A
The 2021 Mercedes AMG C 43 Edition Prem + 4M A is a premium performance car. Our records list a 2996cc petrol engine, though engines vary between versions. 448 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. Among all models from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 25,428 miles recorded at its 2024 MOT tests, Mercedes AMG C 43 Edition Prem + 4M A owners drive about as much as the UK average.
2021 Mercedes AMG C 43 Edition Prem + 4M A Fuel Costs
The 2996cc 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 £1,958 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 2021 Mercedes AMG C 43 Edition Prem + 4M A?
Total estimated annual running cost is £2,413 (£201/month), broken down as £1,958 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Mercedes AMG C 43 Edition Prem + 4M A Reliability Trend
Newer Mercedes AMG C 43 Edition Prem + 4M As pass their MOT more often than older ones, by 12 percentage points on average, which is mostly down to age and wear.
Buying a Used 2021 Mercedes AMG C 43 Edition Prem + 4M A
At 5 years old, the Mercedes AMG C 43 Edition Prem + 4M 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
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.
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 C 43 Edition Prem + 4M A 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 AMG C 43 Edition Prem + 4M A(2021) | 94% | £1,958 | £200 | Grp 30-42 | £2,413 |
| BMW 5 Series(2019) | 92% | £1,958 | £200 | Grp 30-42 | £2,413same |
| BMW X3(2019) | 92% | £1,958 | £200 | Grp 30-42 | £2,413same |
| Mercedes GLC(2019) | 93% | £1,958 | £200 | Grp 30-42 | £2,413same |
| BMW X5(2019) | 92% | £1,958 | £200 | Grp 30-42 | £2,413same |
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 2021 Mercedes AMG C 43 Edition Prem + 4M A
Is the 2021 Mercedes AMG C 43 Edition Prem + 4M A reliable?
Excellent reliability. Very few MOT failures. 94% of MOT tests on 2021 Mercedes AMG C 43 Edition Prem + 4M As ended in a pass, from 448 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points above the average of 82% across all models in the same data.
How much does a 2021 Mercedes AMG C 43 Edition Prem + 4M A cost to run?
Our estimate is £2,413 a year (£201 a month): £1,958 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 2021 Mercedes AMG C 43 Edition Prem + 4M A?
94% of 448 MOT tests on the 2021 Mercedes AMG C 43 Edition Prem + 4M A ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 1227th of 3,336 models first registered in 2021 (top half).
Which year Mercedes AMG C 43 Edition Prem + 4M A has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 Mercedes AMG C 43 Edition Prem + 4M A has the highest MOT pass rate at 94% and the 2019 the lowest at 81%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2021 Mercedes AMG C 43 Edition Prem + 4M A?
The average mileage recorded at MOT tests on the 2021 Mercedes AMG C 43 Edition Prem + 4M A is 25,428 miles, which is in line with the expected 22,200 miles for a 3-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
BMW 5 Series
2019 · 2998cc Petrol
BMW X3
2019 · 2998cc Petrol
Mercedes GLC
2019 · 2996cc Petrol
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