Mercedes GLS 400 AMG LN Prem + D 4MAT A
Reliability, estimated running costs, and MOT data across 3 model years from 843 MOT tests in 2024.
Avg Pass Rate
94%
Total Tests
843
Highest Pass Rate
2020 (92%)
Years Covered
3
About the Mercedes GLS 400 AMG LN Prem + D 4MAT A
The Mercedes GLS 400 AMG LN Prem + D 4MAT A was MOT tested 843 times in 2024 (DVSA data, retests included) across 3 model years (2019 to 2021), with an average pass rate of 94%. That's comfortably above the average of 82% across all models in our data. Our records list diesel versions.
Best and Worst Years
Of the years with at least 100 tests, the 2020 model has the highest pass rate at 92% from 477 tests. The 2021 model has the lowest at 90%. With just a 2 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Mileage Across Years
The oldest model in our data (2019) averages 46,574 miles, while the newest (2021) averages 35,601 miles.
Compared to the Mercedes brand average of 87%, the GLS 400 AMG LN Prem + D 4MAT A performs 7 points better, making it one of the more reliable options in the Mercedes range.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 2021 detailsHow reliable is the Mercedes GLS 400 AMG LN Prem + D 4MAT A?
Mercedes GLS 400 AMG LN Prem + D 4MAT A by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Mercedes GLS 400 AMG LN Prem + D 4MAT A
Is the Mercedes GLS 400 AMG LN Prem + D 4MAT A reliable?
Across its 3 model years in our data (2019 to 2021), the Mercedes GLS 400 AMG LN Prem + D 4MAT A averages a 94% MOT pass rate, from 843 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points above the average of 82% across all models in the same data. The 2020 model has the highest pass rate of the years with at least 100 tests, at 92%.
Which year Mercedes GLS 400 AMG LN Prem + D 4MAT A has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Mercedes GLS 400 AMG LN Prem + D 4MAT A has the highest MOT pass rate at 92%, while the 2021 model has the lowest at 90%, a 2 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
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