Mercedes GLC 300 AMG Line De 4MATIC A
Reliability, estimated running costs, and MOT data across 2 model years from 647 MOT tests in 2024.
Avg Pass Rate
94%
Total Tests
647
Highest Pass Rate
2021 (96%)
Years Covered
2
About the Mercedes GLC 300 AMG Line De 4MATIC A
The Mercedes GLC 300 AMG Line De 4MATIC A was MOT tested 647 times in 2024 (DVSA data, retests included) across 2 model years (2020 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 hybrid versions.
Best and Worst Years
Of the years with at least 100 tests, the 2021 model has the highest pass rate at 96% from 305 tests. The 2020 model has the lowest at 92%. With just a 4 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 41,639 miles, while the newest (2021) averages 34,505 miles.
Compared to the Mercedes brand average of 87%, the GLC 300 AMG Line De 4MATIC 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 GLC 300 AMG Line De 4MATIC A?
Mercedes GLC 300 AMG Line De 4MATIC 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 De 4MATIC A
Is the Mercedes GLC 300 AMG Line De 4MATIC A reliable?
Across its 2 model years in our data (2020 to 2021), the Mercedes GLC 300 AMG Line De 4MATIC A averages a 94% MOT pass rate, from 647 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 2021 model has the highest pass rate of the years with at least 100 tests, at 96%.
Which year Mercedes GLC 300 AMG Line De 4MATIC A has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 Mercedes GLC 300 AMG Line De 4MATIC A has the highest MOT pass rate at 96%, while the 2020 model has the lowest at 92%, a 4 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Mercedes GLC 300 AMG Line De 4MATIC A Guides & Articles
Cars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Running CostsCheapest Cars to Run in 2026: Running Costs From DVSA MOT Data
9 min read
Reliability20 Most Reliable Used Cars UK 2026: Real MOT Pass Rate Rankings
10 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Common Problems: 7 Issues That Could Cost £1,500+ (2026)
13 min read
Checking a specific Mercedes GLC 300 AMG Line De 4MATIC A?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.