MERCEDES GLC 300 AMG LINE DE 4MATIC A (2020)
Running costs, common problems, and reliability data based on 342 real MOT tests in 2024.
MOT Pass Rate
92%
Total Tests (2024)
342
Avg Mileage
41,639 mi
Est. Annual Cost
£1,772
Is the 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A reliable?
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 4 years old, 92% of MERCEDES GLC 300 AMG LINE DE 4MATIC As from 2020 passed their MOT first time in 2024. That's based on 342 tests across the UK. The average mileage at this age is 41,639 miles.
How does the 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A compare?
Mileage Analysis
The average 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A has 41,639 miles on the clock, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a MERCEDES GLC 300 AMG LINE DE 4MATIC A?
The most reliable year is the 2021 model with a 96% MOT pass rate, while the 2020 model has the lowest at 92%. Consider a different year if reliability is a priority.
How much does a 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A 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.
MERCEDES GLC 300 AMG LINE DE 4MATIC A by Year
Checking a specific MERCEDES GLC 300 AMG LINE DE 4MATIC A?
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About the 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A
The 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A is a family car with a 1950cc petrol engine. 342 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2020, the average MOT pass rate is 92%, and this model falls short of that benchmark.
With an average of 41,639 miles at 4 years old, MERCEDES GLC 300 AMG LINE DE 4MATIC A owners cover more miles than the average driver.
2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A Fuel Costs
The 1950cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 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 GLC 300 AMG LINE DE 4MATIC A?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 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 GLC 300 AMG LINE DE 4MATIC A
At 4 years old, the MERCEDES GLC 300 AMG LINE DE 4MATIC A offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Alternatives to the 2020 MERCEDES GLC 300 AMG LINE DE 4MATIC A
The MERCEDES GLC 300 AMG LINE DE 4MATIC A is actually the most reliable option among similar petrol family cars from this era. Here are comparable petrol cars with similar engines:
- LAND ROVER DISCOVERY SPORT R-DYN SE D A (2020) 90% pass rate (-2%) from 5,505 tests
- BMW 520D M SPORT MHEV AUTO (2021) 89% pass rate (-3%) from 3,423 tests
- BMW 320D M SPORT MHEV AUTO (2021) 91% pass rate (-1%) from 3,336 tests
- VOLVO XC90 R-DESIGN B5 MHEV AWD AUTO (2021) 90% pass rate (-2%) from 2,911 tests