Mercedes Benz 250 (1986)
1986 Mercedes Benz 250
CarHunch analysed 150 real MOT records for the 1986 Mercedes Benz 250. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1986 Mercedes-Benz 250 passes its MOT first time in just 65% of cases, well below the UK average of 80%, signalling that these nearly 40-year-old cars need serious mechanical attention. With 16.7% having experienced a dangerous defect, buyers should expect to budget for significant repairs before purchase and factor in ongoing maintenance costs.
These cars are running at 178,804 miles on the median, which is typical for their age, but they're generating an average of 1.7 failures and 6.6 advisories per test—suggesting wear across multiple systems rather than one critical weak point. If you're considering one, have a full pre-purchase inspection by a Mercedes specialist, because the MOT pass rate tells you most examples need work to reach roadworthy standard.
What to check before buying a 1986 Mercedes Benz 250
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 250
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 |
|---|---|---|---|
| Diesel (98%) | 147 | 64.4% | 1.73 |
| Petrol (2%) | 3 | 100% | 0 |
Mileage Distribution
Most 1986 Mercedes Benz 250 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 1986 Mercedes Benz 250 vehicles fall between 135,319 and 217,887 miles.
MOT History Averages
Most Common MOT Issues — 1986 Mercedes Benz 250
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
-
31.2%
Parking brake: efficiency below requirements
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21.6%
Oil leak
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20.7%
Offside Rear Tyre worn close to the legal limit
-
20.5%
Nearside Rear Tyre worn close to the legal limit
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17%
Nearside Front Brake pipe slightly corroded
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15.9%
Nearside Front Tyre worn close to the legal limit
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15.9%
Offside Front Tyre worn close to the legal limit
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13.5%
Offside Front Brake pipe slightly corroded
Data covers a 3-year window centred on 1986. Counts include advisories and failures.
Found a specific Mercedes Benz 250?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.