Mercedes GLC 300 AMG Line Prem De 4M A
Reliability, estimated running costs, and MOT data across 3 model years from 1,911 MOT tests in 2024.
Avg Pass Rate
92%
Total Tests
1,911
Highest Pass Rate
2020 (95%)
Years Covered
3
About the Mercedes GLC 300 AMG Line Prem De 4M A
The Mercedes GLC 300 AMG Line Prem De 4M A was MOT tested 1,911 times in 2024 (DVSA data, retests included) across 3 model years (2020 to 2022), with an average pass rate of 92%. That's comfortably above the average of 82% across all models in our data. Our records list diesel hybrid versions.
Best and Worst Years
Of the years with at least 100 tests, the 2020 model has the highest pass rate at 95% from 624 tests. The 2021 model has the lowest at 94%. With just a 1 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 (2020) averages 39,366 miles, while the newest (2022) averages 33,379 miles.
Compared to the Mercedes brand average of 87%, the GLC 300 AMG Line Prem De 4M A performs 5 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 2022 detailsHow reliable is the Mercedes GLC 300 AMG Line Prem De 4M A?
Mercedes GLC 300 AMG Line Prem De 4M A by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Mercedes GLC 300 AMG Line Prem De 4M A
Is the Mercedes GLC 300 AMG Line Prem De 4M A reliable?
Across its 3 model years in our data (2020 to 2022), the Mercedes GLC 300 AMG Line Prem De 4M A averages a 92% MOT pass rate, from 1,911 tests (DVSA MOT data for tests in 2024, retests included). That's 10 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 95%.
Which year Mercedes GLC 300 AMG Line Prem De 4M A has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Mercedes GLC 300 AMG Line Prem De 4M A has the highest MOT pass rate at 95%, while the 2021 model has the lowest at 94%, a 1 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
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