MERCEDES GLS 400 AMG LN PREM+EXE D 4M A (2020)
Running costs, common problems, and reliability data based on 246 real MOT tests in 2024.
MOT Pass Rate
89%
Total Tests (2024)
246
Avg Mileage
38,865 mi
Est. Annual Cost
£1,840
Is the 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A reliable?
Good reliability. Occasional issues but generally solid. That's 7 points above the national average of 82%.
At 4 years old, 89% of MERCEDES GLS 400 AMG LN PREM+EXE D 4M As from 2020 passed their MOT first time in 2024. That's based on 246 tests across the UK. The average mileage at this age is 38,865 miles.
How does the 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A compare?
Mileage Analysis
The average 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A has 38,865 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 GLS 400 AMG LN PREM+EXE D 4M A?
The most reliable year is the 2021 model with a 91% MOT pass rate, while the 2020 model has the lowest at 89%. Consider a different year if reliability is a priority.
How much does a 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M 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 LN PREM+EXE D 4M A by Year
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About the 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A
The 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A is a large car with a 2925cc diesel engine. 246 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It sits in the bottom 78% of 2020 cars for MOT pass rates.
With an average of 38,865 miles at 4 years old, MERCEDES GLS 400 AMG LN PREM+EXE D 4M A owners cover more miles than the average driver.
2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M 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 LN PREM+EXE D 4M A?
Total estimated annual running cost is £1,840 (£153/month), broken down as £1245 fuel, £190 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 89% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A
At 4 years old, the MERCEDES GLS 400 AMG LN PREM+EXE D 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.
Alternatives to the 2020 MERCEDES GLS 400 AMG LN PREM+EXE D 4M A
If reliability is your priority, there are 3 similar cars with a higher MOT pass rate. 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 (+2%) from 40,494 tests
- FORD RANGER (2019) 87% pass rate (-2%) from 32,194 tests
- LAND ROVER RANGE ROVER VELAR (2018) 91% pass rate (+2%) from 29,640 tests