MERCEDES C 300 AMG LN NGT ED PRM D 4M A (2020)
Running costs, reliability data, and common problems from 57 real MOT tests.
Annual Cost
£1,637
£136/month
MOT Pass Rate
86%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 18-32
1950cc Diesel
Solid Option
86% pass rate, £1637/year to run. Close to the national average.
Check a specific MERCEDES C 300 AMG LN NGT ED PRM D 4M A
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
Annual Running Costs
~48 mpg
Flat rate (post-2017)
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
Get an insurance quote for this MERCEDES C 300 AMG LN NGT ED PRM D 4M A
Compare quotes and find the best deal
Reliability Verdict
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 6 years old, 86% of MERCEDES C 300 AMG LN NGT ED PRM D 4M As from 2020 passed their MOT first time in 2026. That's based on 57 tests across the UK. The average mileage at this age is 35,938 miles.
Got a MERCEDES C 300 AMG LN NGT ED PRM D 4M A you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
35,938
Average miles
44,400
Expected for age
The average 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A has 35,938 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.
Looking at a specific MERCEDES C 300 AMG LN NGT ED PRM D 4M A?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
MERCEDES C 300 AMG LN NGT ED PRM D 4M A by Year
Similar Cars to Consider
Check a Specific Mercedes C 300 amg ln ngt ed prm d 4m a
Enter a reg plate to get the full MOT history, health score, and mileage verification.
Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.
About the 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A
The 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A is a family car with a 1950cc diesel engine. 57 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 90% of 2020 cars for MOT pass rates.
With an average of 35,938 miles at 6 years old, MERCEDES C 300 AMG LN NGT ED PRM D 4M A owners drive about as much as the UK average.
2020 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). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A?
Total estimated annual running cost is £1,637 (£136/month), broken down as £1037 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 86% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A
At 6 years old, the MERCEDES C 300 AMG LN NGT ED PRM D 4M A 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 57 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2020 MERCEDES C 300 AMG LN NGT ED PRM D 4M A's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Watch outExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
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 LN NGT ED PRM D 4M A stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES C 300 AMG LN NGT ED PRM D 4M A(2020) | 86% | £1037 | £195 | Grp 18-32 | £1637 |
| VOLKSWAGEN GOLF(2018) | 92% | £1037 | £190 | Grp 18-32 | £1482-£155 |
| FORD FOCUS(2019) | 89% | £905 | £190 | Grp 12-25 | £1500-£137 |
| MERCEDES A(2019) | 91% | £905 | £190 | Grp 12-25 | £1350-£287 |
| MERCEDES A-CLASS(2018) | 89% | £905 | £190 | Grp 12-25 | £1500-£137 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
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
VOLKSWAGEN GOLF
2018 · 1968cc Diesel
FORD FOCUS
2019 · 1499cc Diesel
MERCEDES A
2019 · 1461cc Diesel
Related Guides
In-depth articles relevant to the Mercedes C 300 amg ln ngt ed prm d 4m a.
Petrol vs Diesel in 2026: Which Actually Costs Less to Own?
8 min read
Buying GuideCars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Running CostsCheapest Cars to Run in 2026: Real Data from 19.8 Million MOT Tests
9 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Problems: 7 Issues Owners Report (2026)
13 min read
Check a specific MERCEDES C 300 AMG LN NGT ED PRM D 4M A
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a MERCEDES C 300 AMG LN NGT ED PRM D 4M A? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
Competitors charge £10-£20 for the same data