MERCEDES C 300 AMG LINE EDITION AUTO (2020)
Running costs, common problems, and reliability data based on 98 real MOT tests in 2024.
MOT Pass Rate
92%
Total Tests (2024)
98
Avg Mileage
46,412 mi
Est. Annual Cost
£1,772
Is the 2020 MERCEDES C 300 AMG LINE EDITION AUTO reliable?
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 4 years old, 92% of MERCEDES C 300 AMG LINE EDITION AUTOs from 2020 passed their MOT first time in 2024. That's based on 98 tests across the UK. The average mileage at this age is 46,412 miles.
How does the 2020 MERCEDES C 300 AMG LINE EDITION AUTO compare?
Mileage Analysis
The average 2020 MERCEDES C 300 AMG LINE EDITION AUTO has 46,412 miles on the clock, which is well above the expected 29,600 miles for a 4-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
How much does a 2020 MERCEDES C 300 AMG LINE EDITION AUTO cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
Checking a specific MERCEDES C 300 AMG LINE EDITION AUTO?
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About the 2020 MERCEDES C 300 AMG LINE EDITION AUTO
The 2020 MERCEDES C 300 AMG LINE EDITION AUTO is a family car with a 1991cc petrol engine. 98 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 46,412 miles at 4 years old, MERCEDES C 300 AMG LINE EDITION AUTO owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2020 MERCEDES C 300 AMG LINE EDITION 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 2020 MERCEDES C 300 AMG LINE EDITION AUTO?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 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 2020 MERCEDES C 300 AMG LINE EDITION AUTO
At 4 years old, the MERCEDES C 300 AMG LINE EDITION 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 98 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2020 MERCEDES C 300 AMG LINE EDITION AUTO
If reliability is your priority, there's one similar car with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- VOLKSWAGEN GOLF (2019) 92% pass rate (same) from 89,653 tests
- FORD KUGA (2018) 90% pass rate (-2%) from 67,605 tests
- MINI COOPER (2018) 92% pass rate (same) from 55,706 tests
- NISSAN QASHQAI (2020) 93% pass rate (+1%) from 52,321 tests