Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A (2021)
Estimated running costs and MOT pass rates from 114 MOT tests in 2024.
Annual Cost
£2,413
£201/month
MOT Pass Rate
99%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 30-42
2999cc Hybrid
Great Choice
99% pass rate, £2,413/year to run. 17 points above average.
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Annual Running Costs
~30 mpg (petrol-engine estimate; hybrids usually use less)
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 17 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.
99% of MOT tests on Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+As from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 114 tests across the UK, retests included. The average mileage recorded at those tests was 12,536 miles.
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How Does It Compare?
Mileage Analysis
12,536
Average miles
22,200
Expected for age
The average 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A had 12,536 miles on the clock at its 2024 MOT, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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About the 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A
The 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A is a premium performance car. Our records list a 2999cc hybrid engine, though engines vary between versions. 114 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 4% of all 2021 models for MOT pass rate.
With an average of 12,536 miles recorded at its 2024 MOT tests, Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A owners tend to use this car less than the typical driver.
2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A Fuel Costs
The 2999cc hybrid engine is on the larger side, so fuel won't be this car's strong point. Our estimate uses around 30 mpg, the figure for a petrol engine of this size, which works out to roughly £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.
What does it cost to own a 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A?
Total estimated annual running cost is £2,413 (£201/month), broken down as £1,958 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 99% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A
At 5 years old, the Mercedes AMG CLS 53NGT Ed Prm+mhev 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.
Common Issues to Watch For
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
Hybrid Battery Health
Medium riskAfter 5 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.
Inverter and Power Electronics
Low riskThe inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.
Regenerative Braking
Medium riskBrake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.
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 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A(2021) | 99% | £1,958 | £200 | Grp 30-42 | £2,413 |
| Toyota RAV4(2020) | 95% | £1,958 | £200 | Grp 25-38 | £2,413same |
| BMW X5 XDRIVE45E M Sport Auto(2021) | 88% | £1,958 | £200 | Grp 30-42 | £2,563+£150 |
| BMW M340I Xdrive MHEV Auto(2021) | 93% | £1,958 | £200 | Grp 30-42 | £2,413same |
| Lexus RX(2019) | 96% | £1,958 | £200 | Grp 35-50 | £2,413same |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A
Is the 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A reliable?
Excellent reliability. Very few MOT failures. 99% of MOT tests on 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+As ended in a pass, from 114 tests (DVSA MOT data for tests in 2024, retests included). That's 17 points above the average of 82% across all models in the same data.
How much does a 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A cost to run?
Our estimate is £2,413 a year (£201 a month): £1,958 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A?
99% of 114 MOT tests on the 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 122nd of 3,336 models first registered in 2021 (top 4%).
What is the average mileage for a 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A?
The average mileage recorded at MOT tests on the 2021 Mercedes AMG CLS 53NGT Ed Prm+mhev 4M+A is 12,536 miles, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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
Toyota RAV4
2020 · 2500cc Hybrid
BMW X5 XDRIVE45E M Sport Auto
2021 · 2998cc Hybrid
BMW M340I Xdrive MHEV Auto
2021 · 2998cc Hybrid
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