Mercedes Benz Glc 300 Amg Line Prem De 4m A (2020)
2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A
CarHunch analysed 329 real MOT records for the 2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2020 GLC 300 is notably reliable, with an 86.3% first-time pass rate that beats the UK average of 80%—and only 8.5% of vehicles have ever suffered a dangerous defect, which is reassuringly low. The diesel variant (which makes up the entire cohort) maintains that same 86.2% pass rate, so fuel type isn't a reliability differentiator here.
At a median mileage of 38,276 miles for a four-year-old car, these vehicles are running well within expected wear patterns. The average 1.6 advisories per test suggest minor wear items rather than serious problems, though you should still budget for routine maintenance—get a pre-purchase inspection report from any used example to check what's been flagged recently.
What to check before buying a 2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Mercedes Benz Glc 300 Amg Line Prem De 4m A
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Electric Diesel (99%) | 327 | 86.2% | 0.21 |
| Other (0%) | 1 | 100% | 0 |
| Electric (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A vehicles fall between 28,090 and 49,074 miles.
2020 Mercedes Benz Glc 300 Amg Line Prem De 4m A — Still on the Road
Strong survival — 271 vehicles still getting MOTs in 2025, 98% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.
MOT History Averages
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