MERCEDES C 300 AMG LINE NGT ED PREM + A (2021)
Running costs, common problems, and reliability data based on 171 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
171
Avg Mileage
21,103 mi
Est. Annual Cost
£1,772
Is the 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 3 years old, 94% of MERCEDES C 300 AMG LINE NGT ED PREM + As from 2021 passed their MOT first time in 2024. That's based on 171 tests across the UK. The average mileage at this age is 21,103 miles.
How does the 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A compare?
Mileage Analysis
The average 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A has 21,103 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 NGT ED 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 NGT ED PREM + A by Year
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About the 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A
The 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A is a family car with a 1991cc hybrid engine. 171 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 21,103 miles at 3 years old, MERCEDES C 300 AMG LINE NGT ED PREM + A owners drive about as much as the UK average.
2021 MERCEDES C 300 AMG LINE NGT ED 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 NGT ED PREM + A?
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 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 MERCEDES C 300 AMG LINE NGT ED 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.
Alternatives to the 2021 MERCEDES C 300 AMG LINE NGT ED PREM + A
The MERCEDES C 300 AMG LINE NGT ED PREM + A is actually the most reliable option among similar hybrid family cars from this era. Here are comparable hybrid cars with similar engines:
- TOYOTA YARIS (2019) 93% pass rate (-1%) from 41,554 tests
- MINI COOPER S (2019) 92% pass rate (-2%) from 33,682 tests
- LAND ROVER RANGE ROVER SPORT (2019) 94% pass rate (same) from 33,069 tests
- TOYOTA C-HR (2019) 92% pass rate (-2%) from 29,893 tests