MERCEDES GLS 400 AMG LINE PREM D 4MAT A (2020)
Running costs, common problems, and reliability data based on 373 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
373
Avg Mileage
39,375 mi
Est. Annual Cost
£1,690
Is the 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A reliable?
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 4 years old, 91% of MERCEDES GLS 400 AMG LINE PREM D 4MAT As from 2020 passed their MOT first time in 2024. That's based on 373 tests across the UK. The average mileage at this age is 39,375 miles.
How does the 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A compare?
Mileage Analysis
The average 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A has 39,375 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.
How much does a 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT 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 GLS 400 AMG LINE PREM D 4MAT A by Year
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About the 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A
The 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A is a large car with a 2925cc diesel engine. 373 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 39,375 miles at 4 years old, MERCEDES GLS 400 AMG LINE PREM D 4MAT A owners cover more miles than the average driver.
2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A 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 2020 MERCEDES GLS 400 AMG LINE PREM D 4MAT A?
Total estimated annual running cost is £1,690 (£141/month), broken down as £1245 fuel, £190 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 GLS 400 AMG LINE PREM D 4MAT A
At 4 years old, the MERCEDES GLS 400 AMG LINE PREM D 4MAT 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 GLS 400 AMG LINE PREM D 4MAT A
The MERCEDES GLS 400 AMG LINE PREM D 4MAT A is actually the most reliable option among similar diesel large cars from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-1%) from 41,000 tests
- MERCEDES GLC (2018) 91% pass rate (same) from 40,494 tests
- FORD RANGER (2019) 87% pass rate (-4%) from 32,194 tests
- LAND ROVER RANGE ROVER VELAR (2018) 91% pass rate (same) from 29,640 tests