MERCEDES AMG GLC 63 4MATIC + AUTO (2020)
Running costs, reliability data, and common problems from 129 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
92%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
3982cc Petrol
Great Choice
92% pass rate, £2042/year to run. 10 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 10 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 92% of MERCEDES AMG GLC 63 4MATIC + AUTOs from 2020 passed their MOT first time in 2026. That's based on 129 tests across the UK. The average mileage at this age is 29,397 miles.
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How Does It Compare?
Mileage Analysis
29,397
Average miles
44,400
Expected for age
The average 2020 MERCEDES AMG GLC 63 4MATIC + AUTO has 29,397 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 4MATIC + AUTO by Year
Similar Cars to Consider
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About the 2020 MERCEDES AMG GLC 63 4MATIC + AUTO
The 2020 MERCEDES AMG GLC 63 4MATIC + AUTO is a performance with a 3982cc petrol engine. 129 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 29,397 miles at 6 years old, MERCEDES AMG GLC 63 4MATIC + AUTO owners tend to use this car less than the typical driver.
2020 MERCEDES AMG GLC 63 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 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 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2020 MERCEDES AMG GLC 63 4MATIC + AUTO
At 6 years old, the MERCEDES AMG GLC 63 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.
Common Issues to Watch For
Based on the 2020 MERCEDES AMG GLC 63 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 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 4MATIC + AUTO(2020) | 92% | £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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