1992 Mercedes-Benz 190 — MOT failures & pass rate
Across 445 MOT tests, the 1992 Mercedes-Benz 190 recorded a 79.5% pass rate. Against all cars of a similar age (23.0% fail rate), the 1992 190 comes out 2.5pp better. Failures cluster in lighting & signalling, suspension and body, structure & corrosion.
What the MOT record shows
No single area dominates — lighting & signalling (11.9%) and suspension (9.9%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are component mounting prescribed areas, position lamp and headlamp aim — component mounting prescribed areas alone was recorded 32 times.
Mileage is the strongest signal on the record: 12.5% of 30-60k cars fail, rising to 22.1% once past 150k.
Advisories point at the next bill rather than this one: brakes was flagged on 31.9% of tests without failing them.
The trend is improving — the fail rate fell from 21.7% in 2021 to 17.4% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 11.9% | 53 |
| 2 | Suspension | 9.9% | 44 |
| 3 | Body, structure & corrosion | 7.0% | 31 |
| 4 | Brakes | 6.7% | 30 |
| 5 | Visibility | 3.1% | 14 |
| 6 | Seat belts & restraints | 2.9% | 13 |
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 | 32 |
| 2 | Position lamp | 29 |
| 3 | Headlamp aim | 20 |
| 4 | Rigid brake pipes | 16 |
| 5 | Coil spring | 16 |
| 6 | Prescribed areas | 13 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 31.9% | 142 |
| 2 | Suspension | 31.5% | 140 |
| 3 | Tyres | 14.6% | 65 |
| 4 | Body, structure & corrosion | 14.4% | 64 |
| 5 | Emissions & environmental | 14.2% | 63 |
| 6 | Other defects | 11.2% | 50 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 32 | 12.5% |
| 60-90k | 51 | 21.6% |
| 90-120k | 58 | 19.0% |
| 120-150k | 90 | 21.1% |
| 150k+ | 204 | 22.1% |
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 352 | 19.9% |
| Petrol | 93 | 22.6% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 106 | 21.7% |
| 2022 | 104 | 25.0% |
| 2023 | 90 | 17.8% |
| 2024 | 76 | 18.4% |
| 2025 | 69 | 17.4% |
What to check before buying a 1992 190
On a 1992 190, lighting & signalling is what the MOT record says goes wrong most — it appeared in 11.9% of tests. Check these areas before you commit.
- Lighting & signalling (11.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (9.9% 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.
- Body, structure & corrosion (7.0% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
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 1992 Mercedes-Benz 190s pass their MOT?
79.5% of the 445 1992 Mercedes-Benz 190 MOT tests in this dataset passed — a 20.4% fail rate.
What is the most common MOT failure on a 1992 Mercedes-Benz 190?
Lighting & signalling, recorded in 11.9% of tests, followed by suspension (9.9%).
Does the 1992 190 get worse with mileage?
Its MOT fail rate rises from 12.5% in the 30-60k band to 22.1% in the 150k+ band.
Methodology & source. Based on 445 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.