MERCEDES C 300 AMG LINE EDITION PREM A (2021)
Running costs, common problems, and reliability data based on 44 real MOT tests in 2024.
MOT Pass Rate
77%
Total Tests (2024)
44
Avg Mileage
24,333 mi
Est. Annual Cost
£2,072
Is the 2021 MERCEDES C 300 AMG LINE EDITION PREM A reliable?
Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 3 years old, 77% of MERCEDES C 300 AMG LINE EDITION PREM As from 2021 passed their MOT first time in 2024. That's based on 44 tests across the UK. The average mileage at this age is 24,333 miles.
How does the 2021 MERCEDES C 300 AMG LINE EDITION PREM A compare?
Mileage Analysis
The average 2021 MERCEDES C 300 AMG LINE EDITION PREM A has 24,333 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.
How much does a 2021 MERCEDES C 300 AMG LINE EDITION PREM A 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.
MERCEDES C 300 AMG LINE EDITION PREM A by Year
Checking a specific MERCEDES C 300 AMG LINE EDITION PREM A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MERCEDES C 300 AMG LINE EDITION PREM A
The 2021 MERCEDES C 300 AMG LINE EDITION PREM A is a family car with a 1991cc hybrid engine. 44 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It sits in the bottom 99% of 2021 cars for MOT pass rates.
With an average of 24,333 miles at 3 years old, MERCEDES C 300 AMG LINE EDITION PREM A owners drive about as much as the UK average.
2021 MERCEDES C 300 AMG LINE EDITION PREM A Fuel Costs
The 1991cc hybrid 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 hybrid prices of 142p per litre (based on 7,400 miles per year). As a hybrid, real-world fuel costs will vary significantly depending on how much electric-only driving you do.
What does it cost to own a 2021 MERCEDES C 300 AMG LINE EDITION PREM A?
Total estimated annual running cost is £2,072 (£173/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 77% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2021 MERCEDES C 300 AMG LINE EDITION PREM A
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. Note: with only 44 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 MERCEDES C 300 AMG LINE EDITION PREM A
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable hybrid cars with similar engines:
- TOYOTA YARIS (2019) 93% pass rate (+16%) from 41,554 tests
- MINI COOPER S (2019) 92% pass rate (+15%) from 33,682 tests
- LAND ROVER RANGE ROVER SPORT (2019) 94% pass rate (+17%) from 33,069 tests
- TOYOTA C-HR (2019) 92% pass rate (+15%) from 29,893 tests