MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA (2021)
Running costs, common problems, and reliability data based on 424 real MOT tests in 2024.
MOT Pass Rate
86%
Total Tests (2024)
424
Avg Mileage
26,272 mi
Est. Annual Cost
£1,840
Is the 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 3 years old, 86% of MERCEDES CLS400 AMG LN NT ED PRM+ D 4MAs from 2021 passed their MOT first time in 2024. That's based on 424 tests across the UK. The average mileage at this age is 26,272 miles.
How does the 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA compare?
Mileage Analysis
The average 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA has 26,272 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 CLS400 AMG LN NT ED PRM+ D 4MA 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.
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About the 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA
The 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA is a large car with a 2925cc diesel engine. 424 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It sits in the bottom 90% of 2021 cars for MOT pass rates.
With an average of 26,272 miles at 3 years old, MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA owners drive about as much as the UK average.
2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA Fuel Costs
The 2925cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 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 CLS400 AMG LN NT ED PRM+ D 4MA?
Total estimated annual running cost is £1,840 (£153/month), broken down as £1245 fuel, £190 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 2021 MERCEDES CLS400 AMG LN NT ED PRM+ D 4MA
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 CLS400 AMG LN NT ED PRM+ D 4MA
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (+4%) from 41,000 tests
- FORD RANGER (2019) 87% pass rate (+1%) from 32,194 tests
- AUDI Q5 (2019) 93% pass rate (+7%) from 24,241 tests
- AUDI A5 (2019) 90% pass rate (+4%) from 22,290 tests