Mercedes C 300 AMG Line Ed Prem + E A (2020)
Estimated running costs and MOT pass rates from 134 MOT tests in 2024.
Annual Cost
£2,236
£186/month
MOT Pass Rate
82%
Good
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 18-32
1991cc Hybrid
Solid Option
82% pass rate, £2,236/year to run. Close to the average across all models.
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Annual Running Costs
~36 mpg (petrol-engine estimate; hybrids usually use less)
Standard rate (from April 2017)
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
Good reliability. Occasional issues but generally solid. That's close to the average of 82% across all models in our data. It falls below the Mercedes brand average of 87%.
82% of MOT tests on Mercedes C 300 AMG Line Ed Prem + E As from 2020 ended in a pass in 2024, when they were about 4 years old. That's based on 134 tests across the UK, retests included. The average mileage recorded at those tests was 42,651 miles.
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How Does It Compare?
Mileage Analysis
42,651
Average miles
29,600
Expected for age
The average 2020 Mercedes C 300 AMG Line Ed Prem + E A had 42,651 miles on the clock at its 2024 MOT, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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Best Year to Buy?
Of the years with at least 100 tests, the 2021 model has the highest MOT pass rate at 84%, while the 2020 model has the lowest at 82%. Consider a different year if reliability is a priority. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Mercedes C 300 AMG Line Ed Prem + E A by Year
Similar Cars to Consider
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About the 2020 Mercedes C 300 AMG Line Ed Prem + E A
The 2020 Mercedes C 300 AMG Line Ed Prem + E A is a premium car. Our records list a 1991cc hybrid engine, though engines vary between versions. 134 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 4% of 2020 models for MOT pass rate.
With an average of 42,651 miles recorded at its 2024 MOT tests, Mercedes C 300 AMG Line Ed Prem + E A owners cover more miles than the average driver.
2020 Mercedes C 300 AMG Line Ed Prem + E A Fuel Costs
The 1991cc hybrid engine offers a reasonable balance between performance and economy. Our estimate uses around 36 mpg, the figure for a petrol engine of this size, which works out to roughly £1,631 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). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.
What does it cost to own a 2020 Mercedes C 300 AMG Line Ed Prem + E A?
Total estimated annual running cost is £2,236 (£186/month), broken down as £1,631 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 82% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2020 Mercedes C 300 AMG Line Ed Prem + E A
At 6 years old, the Mercedes C 300 AMG Line Ed Prem + E 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.
Hybrid Battery Health
Medium riskAfter 6 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.
Inverter and Power Electronics
Low riskThe inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.
Regenerative Braking
Medium riskBrake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.
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 2020 Mercedes C 300 AMG Line Ed Prem + E 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 C 300 AMG Line Ed Prem + E A(2020) | 82% | £1,631 | £200 | Grp 18-32 | £2,236 |
| Mercedes C(2018) | 90% | £1,631 | £200 | Grp 18-32 | £2,086-£150 |
| Toyota Yaris(2019) | 93% | £1,398 | £200 | Grp 12-25 | £1,853-£383 |
| MINI Cooper S(2019) | 92% | £1,398 | £200 | Grp 12-25 | £1,853-£383 |
| Land Rover Range Rover Sport(2019) | 94% | £1,631 | £200 | Grp 18-32 | £2,086-£150 |
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 2020 Mercedes C 300 AMG Line Ed Prem + E A
Is the 2020 Mercedes C 300 AMG Line Ed Prem + E A reliable?
Good reliability. Occasional issues but generally solid. 82% of MOT tests on 2020 Mercedes C 300 AMG Line Ed Prem + E As ended in a pass, from 134 tests (DVSA MOT data for tests in 2024, retests included). That's level with the average of 82% across all models in the same data.
How much does a 2020 Mercedes C 300 AMG Line Ed Prem + E A cost to run?
Our estimate is £2,236 a year (£186 a month): £1,631 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2020 Mercedes C 300 AMG Line Ed Prem + E A?
82% of 134 MOT tests on the 2020 Mercedes C 300 AMG Line Ed Prem + E A ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 2459th of 2,554 models first registered in 2020 (bottom 4%).
Which year Mercedes C 300 AMG Line Ed Prem + E A has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 Mercedes C 300 AMG Line Ed Prem + E A has the highest MOT pass rate at 84% and the 2020 the lowest at 82%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2020 Mercedes C 300 AMG Line Ed Prem + E A?
The average mileage recorded at MOT tests on the 2020 Mercedes C 300 AMG Line Ed Prem + E A is 42,651 miles, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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
2018 · 1991cc Hybrid
Toyota Yaris
2019 · 1497cc Hybrid
MINI Cooper S
2019 · 1499cc Hybrid
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