MERCEDES AMG GLC 63 S 4MATIC + AUTO (2020)
Running costs, reliability data, and common problems from 46 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
91%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
3982cc Petrol
Great Choice
91% pass rate, £2042/year to run. 9 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 91% of MERCEDES AMG GLC 63 S 4MATIC + AUTOs from 2020 passed their MOT first time in 2026. That's based on 46 tests across the UK. The average mileage at this age is 32,570 miles.
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How Does It Compare?
Mileage Analysis
32,570
Average miles
44,400
Expected for age
The average 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO has 32,570 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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MERCEDES AMG GLC 63 S 4MATIC + AUTO by Year
Similar Cars to Consider
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About the 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO
The 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO is a performance with a 3982cc petrol engine. 46 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 32,570 miles at 6 years old, MERCEDES AMG GLC 63 S 4MATIC + AUTO owners tend to use this car less than the typical driver.
2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO Fuel Costs
The 3982cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO
At 6 years old, the MERCEDES AMG GLC 63 S 4MATIC + AUTO 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 46 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2020 MERCEDES AMG GLC 63 S 4MATIC + AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 6 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Low riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
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 AMG GLC 63 S 4MATIC + AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES AMG GLC 63 S 4MATIC + AUTO(2020) | 91% | £1592 | £195 | Grp 35-50 | £2042 |
| MERCEDES C(2019) | 91% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE CAYENNE(2019) | 95% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE 911(2018) | 96% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| AUDI A6(2020) | 94% | £1592 | £190 | Grp 35-50 | £2037-£5 |
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
MERCEDES C
2019 · 3982cc Petrol
PORSCHE CAYENNE
2019 · 3996cc Petrol
PORSCHE 911
2018 · 3996cc Petrol
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