1995 Mercedes-Benz S-Class — MOT failures & pass rate
537 MOT tests on the 1995 Mercedes-Benz S-Class are in this dataset, and 84.7% of them passed. Executive cars of a similar age fail 21.3% of the time, so this is 6.0pp better than the group it competes with. Failures cluster in lighting & signalling, visibility and emissions & environmental.
What the MOT record shows
No single area dominates — lighting & signalling (8.8%) and visibility (7.1%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are catalyst emissions, wipers and washers — catalyst emissions alone was recorded 42 times.
Mileage matters less than usual here: the 1995 S-Class fails 12.1% of the time in the 30-60k band and 10.5% at 150k+, a spread of only 1.6 points.
Suspension is the most common advisory, noted on 36.9% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 16.1% in 2021 to 13.8% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 8.8% | 47 |
| 2 | Visibility | 7.1% | 38 |
| 3 | Emissions & environmental | 6.9% | 37 |
| 4 | Brakes | 5.4% | 29 |
| 5 | Suspension | 5.0% | 27 |
| 6 | Body, structure & corrosion | 3.5% | 19 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Catalyst emissions | 42 |
| 2 | Wipers | 27 |
| 3 | Washers | 25 |
| 4 | Headlamp aim | 19 |
| 5 | Individual direction indicators | 13 |
| 6 | Service brake performance | 12 |
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 | 36.9% | 198 |
| 2 | Brakes | 32.2% | 173 |
| 3 | Emissions & environmental | 25.3% | 136 |
| 4 | Tyres | 20.1% | 108 |
| 5 | Body, structure & corrosion | 8.2% | 44 |
| 6 | Visibility | 7.4% | 40 |
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 | 66 | 12.1% |
| 60-90k | 130 | 17.7% |
| 90-120k | 145 | 13.1% |
| 120-150k | 97 | 19.6% |
| 150k+ | 76 | 10.5% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 124 | 16.1% |
| 2022 | 130 | 13.9% |
| 2023 | 111 | 15.3% |
| 2024 | 92 | 17.4% |
| 2025 | 80 | 13.8% |
What to check before buying a 1995 S-Class
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 8.8% of tests. Start there.
- Lighting & signalling (8.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (7.1% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
- Emissions & environmental (6.9% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.
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 1995 Mercedes-Benz S-Classs pass their MOT?
84.7% of the 537 1995 Mercedes-Benz S-Class MOT tests in this dataset passed — a 15.3% fail rate.
What is the most common MOT failure on a 1995 Mercedes-Benz S-Class?
Lighting & signalling, recorded in 8.8% of tests, followed by visibility (7.1%).
Does the 1995 S-Class get worse with mileage?
Its MOT fail rate rises from 12.1% in the 30-60k band to 10.5% in the 150k+ band.
Methodology & source. Based on 537 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.