Mercedes GLC 300 AMG Line Premium 4M A
Reliability, estimated running costs, and MOT data across 4 model years from 990 MOT tests in 2024.
Avg Pass Rate
93%
Total Tests
990
Highest Pass Rate
2020 (94%)
Years Covered
4
About the Mercedes GLC 300 AMG Line Premium 4M A
The Mercedes GLC 300 AMG Line Premium 4M A was MOT tested 990 times in 2024 (DVSA data, retests included) across 4 model years (2019 to 2022), with an average pass rate of 93%. That's comfortably above the average of 82% across all models in our data. Our records list petrol and hybrid versions.
Best and Worst Years
Of the years with at least 100 tests, the 2020 model has the highest pass rate at 94% from 432 tests. The 2019 model has the lowest at 85%. The 9 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.
Reliability Trend
Newer Mercedes GLC 300 AMG Line Premium 4M As pass their MOT more often than older ones, by 9 percentage points on average, which is mostly down to age and wear.
Mileage Across Years
The oldest model in our data (2019) averages 35,527 miles, while the newest (2022) averages 18,139 miles.
Compared to the Mercedes brand average of 87%, the GLC 300 AMG Line Premium 4M A performs 6 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 Premium 4M A?
Mercedes GLC 300 AMG Line Premium 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 Premium 4M A
Is the Mercedes GLC 300 AMG Line Premium 4M A reliable?
Across its 4 model years in our data (2019 to 2022), the Mercedes GLC 300 AMG Line Premium 4M A averages a 93% MOT pass rate, from 990 tests (DVSA MOT data for tests in 2024, retests included). That's 11 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 Premium 4M A has the best MOT pass rate?
Of the years with at least 100 tests, the 2020 Mercedes GLC 300 AMG Line Premium 4M A has the highest MOT pass rate at 94%, while the 2019 model has the lowest at 85%, a 9 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 Premium 4M As more reliable?
Newer Mercedes GLC 300 AMG Line Premium 4M As pass their MOT more often than older ones, by 9 percentage points on average, which is mostly down to age and wear.
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