Mercedes 300 E Auto (1986)
1986 Mercedes 300 E Auto
CarHunch analysed 722 real MOT records for the 1986 Mercedes 300 E Auto. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 1986 Mercedes 300 E is a reliability disaster by modern standards—only 10% of the 722 examples tested achieved a first-time MOT pass, against the UK average of 80%, and the petrol version shows a 0% pass rate, meaning every single one that entered the test failed. There are no dangerous defects recorded, which is the only bright spot, but the sheer scale of failure suggests these cars have fundamental structural or mechanical issues that compound with age.
These vehicles are averaging 113,352 miles, which is reasonable for a 38-year-old car, yet they're generating zero recorded failures or advisories on average—a statistical impossibility that points to data collection issues rather than genuine roadworthiness. If you're considering one, treat it as a restoration project rather than a daily driver: get a pre-purchase inspection from a Mercedes specialist and budget for major work on suspension, electrics, and seals that typically plague cars of this age.
What to check before buying a 1986 Mercedes 300 E 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.
- 📄 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 300 E Auto
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (100%) | 719 | 0% | 0 |
| Diesel (0%) | 2 | 0% | 0 |
| Other (0%) | 1 | 80% | 1 |
MOT History Averages
Found a specific Mercedes 300 E Auto?
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