MERCEDES C 300 AMG LN NGT ED PRM D 4M A (2021)
Running costs, common problems, and reliability data based on 30 real MOT tests in 2024.
MOT Pass Rate
80%
Total Tests (2024)
30
Avg Mileage
45,521 mi
Est. Annual Cost
£1,632
Is the 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 3 years old, 80% of MERCEDES C 300 AMG LN NGT ED PRM D 4M As from 2021 passed their MOT first time in 2024. That's based on 30 tests across the UK. The average mileage at this age is 45,521 miles.
How does the 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A compare?
Mileage Analysis
The average 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A has 45,521 miles on the clock, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
How much does a 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M 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 LN NGT ED PRM D 4M A by Year
Checking a specific MERCEDES C 300 AMG LN NGT ED PRM D 4M A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A
The 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A is a family car with a 1950cc diesel engine. 30 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It sits in the bottom 98% of 2021 cars for MOT pass rates.
With an average of 45,521 miles at 3 years old, MERCEDES C 300 AMG LN NGT ED PRM D 4M A owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A Fuel Costs
The 1950cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,037 per year at current diesel prices of 148p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A?
Total estimated annual running cost is £1,632 (£136/month), broken down as £1037 fuel, £190 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 80% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M 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 30 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2021 MERCEDES C 300 AMG LN NGT ED PRM D 4M A
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable diesel cars with similar engines:
- FORD FOCUS (2019) 89% pass rate (+9%) from 93,803 tests
- MERCEDES A (2019) 91% pass rate (+11%) from 89,588 tests
- FORD KUGA (2019) 91% pass rate (+11%) from 72,831 tests
- VOLKSWAGEN POLO (2019) 89% pass rate (+9%) from 65,751 tests