Mercedes GLC 300 AMG Line Prem D 4M A
Reliability, estimated running costs, and MOT data across 8 model years from 15,747 MOT tests in 2024.
Avg Pass Rate
95%
Total Tests
15,747
Highest Pass Rate
2020 (94%)
Years Covered
8
About the Mercedes GLC 300 AMG Line Prem D 4M A
The Mercedes GLC 300 AMG Line Prem D 4M A was MOT tested 15,747 times in 2024 (DVSA data, retests included) across 8 model years (2019 to 2022), with an average pass rate of 95%. 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 94% from 3,691 tests. The 2021 model has the lowest at 93%. With just a 1 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Reliability Trend
The Mercedes GLC 300 AMG Line Prem D 4M A has maintained consistent MOT pass rates across model years, varying by only 0 percentage points.
Mileage Across Years
The oldest model in our data (2019) averages 44,503 miles, while the newest (2022) averages 30,533 miles.
Compared to the Mercedes brand average of 87%, the GLC 300 AMG Line Prem D 4M A performs 8 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 D 4M A?
Mercedes GLC 300 AMG Line Prem D 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 D 4M A
Is the Mercedes GLC 300 AMG Line Prem D 4M A reliable?
Across its 8 model years in our data (2019 to 2022), the Mercedes GLC 300 AMG Line Prem D 4M A averages a 95% MOT pass rate, from 15,747 tests (DVSA MOT data for tests in 2024, retests included). That's 13 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 94%.
Which year Mercedes GLC 300 AMG Line Prem D 4M A has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Mercedes GLC 300 AMG Line Prem D 4M A has the highest MOT pass rate at 94%, while the 2021 model has the lowest at 93%, a 1 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Are newer Mercedes GLC 300 AMG Line Prem D 4M As more reliable?
The Mercedes GLC 300 AMG Line Prem D 4M A has maintained consistent MOT pass rates across model years, varying by only 0 percentage points.
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