Mercedes Benz C 300 Sport Edition De Auto (2021)
2021 Mercedes Benz C 300 Sport Edition De Auto
CarHunch analysed 103 real MOT records for the 2021 Mercedes Benz C 300 Sport Edition De Auto. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This C 300 diesel is slightly more reliable than the UK average, with an 85.1% first-time pass rate versus 80% nationally, though one concern is that 21.4% of these cars have recorded dangerous defects at some point—a notably high figure worth investigating on any used example you're viewing. The median mileage of 55,932 miles for a 2021 model is reasonable, and the average failure rate of 0.4 per vehicle suggests most cars make it through MOT without major issues, though advisories average 1.6 per car, indicating ongoing minor wear items.
When shopping for one of these, focus your pre-purchase inspection on the systems flagged most often for advisories—likely suspension, braking, or emissions-related items given the diesel platform—and always request the full MOT history to confirm no dangerous defects appear in its record before committing.
What to check before buying a 2021 Mercedes Benz C 300 Sport Edition De Auto
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.
- ⚠️ 21.4% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 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 C 300 Sport Edition De Auto
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2021 Mercedes Benz C 300 Sport Edition De Auto 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 2021 Mercedes Benz C 300 Sport Edition De Auto vehicles fall between 43,472 and 78,128 miles.
MOT History Averages
Found a specific Mercedes Benz C 300 Sport Edition De Auto?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.
Other model years — Mercedes Benz C 300 Sport Edition De Auto: