1985 Mercedes-Benz 280 — MOT failures & pass rate
Across 1,030 MOT tests analysed for the 1985 Mercedes-Benz 280, the most common recorded failure areas were lighting & signalling, suspension and brakes. Its pass rate of 81.5% was in line with the average for cars of a similar age (81.0%). Higher-mileage examples failed more often — 29.5% in the 150k+ group versus 16.7% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 10.7% | 110 |
| 2 | Suspension | 6.6% | 68 |
| 3 | Brakes | 6.4% | 66 |
| 4 | Body, structure & corrosion | 6.2% | 64 |
| 5 | Visibility | 5.6% | 58 |
| 6 | Emissions & environmental | 2.9% | 30 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 69 |
| 2 | Headlamp aim | 59 |
| 3 | Service brake performance | 38 |
| 4 | Wipers | 36 |
| 5 | Washers | 34 |
| 6 | Position lamp | 27 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 23.2% | 239 |
| 2 | Emissions & environmental | 21.6% | 222 |
| 3 | Body, structure & corrosion | 17.1% | 176 |
| 4 | Brakes | 14.4% | 148 |
| 5 | Tyres | 10.3% | 106 |
| 6 | Steering | 7.1% | 73 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 36 | 16.7% |
| 30-60k | 114 | 12.3% |
| 60-90k | 254 | 15.0% |
| 90-120k | 290 | 16.6% |
| 120-150k | 196 | 21.4% |
| 150k+ | 139 | 29.5% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 244 | 21.7% |
| 2022 | 221 | 18.6% |
| 2023 | 200 | 17.0% |
| 2024 | 201 | 17.4% |
| 2025 | 164 | 16.5% |
What to check before buying a 1985 280
Before buying a 1985 Mercedes-Benz 280, focus on the areas it most often fails on. Lighting & signalling accounted for 10.7% of tests for this year.
- Lighting & signalling (10.7% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (6.6% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Brakes (6.4% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 1985 Mercedes-Benz 280s pass their MOT?
81.5% of the 1,030 1985 Mercedes-Benz 280 MOT tests in this dataset passed — a 18.4% fail rate.
What is the most common MOT failure on a 1985 Mercedes-Benz 280?
Lighting & signalling, recorded in 10.7% of tests, followed by suspension (6.6%).
Does the 1985 280 get worse with mileage?
Its MOT fail rate rises from 16.7% in the 0-30k band to 29.5% in the 150k+ band.
Methodology & source. Based on 1,030 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.