1995 Mercedes-Benz Sl — MOT failures & pass rate
Across 3,145 MOT tests, the 1995 Mercedes-Benz Sl recorded an 85.0% pass rate. That is 4.9 percentage points better than coupes & convertibles of a similar age, which fail at 19.9%. Failures cluster in lighting & signalling, brakes and emissions & environmental.
What the MOT record shows
Lighting & signalling dominates the failure mix at 10.4% of all tests — 5.8 points clear of brakes, so it is the first thing to check.
At component level the recurring items are catalyst emissions, headlamp aim and side repeaters — catalyst emissions alone was recorded 208 times.
A 150k+ example is materially riskier than a 0-30k one: 20.8% versus 9.6%.
Advisories point at the next bill rather than this one: brakes was flagged on 24.1% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 10.4% | 326 |
| 2 | Brakes | 4.6% | 145 |
| 3 | Emissions & environmental | 4.5% | 142 |
| 4 | Visibility | 3.7% | 116 |
| 5 | Tyres | 2.9% | 90 |
| 6 | Suspension | 2.7% | 84 |
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 | 208 |
| 2 | Headlamp aim | 119 |
| 3 | Side repeaters | 90 |
| 4 | Rigid brake pipes | 68 |
| 5 | Individual direction indicators | 64 |
| 6 | Washers | 64 |
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 | 24.1% | 758 |
| 2 | Suspension | 21.7% | 682 |
| 3 | Tyres | 15.8% | 497 |
| 4 | Emissions & environmental | 15.3% | 482 |
| 5 | Steering | 7.0% | 219 |
| 6 | Body, structure & corrosion | 5.9% | 186 |
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 | 94 | 9.6% |
| 30-60k | 393 | 7.6% |
| 60-90k | 905 | 12.4% |
| 90-120k | 820 | 16.2% |
| 120-150k | 584 | 19.2% |
| 150k+ | 327 | 20.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 665 | 15.9% |
| 2022 | 688 | 16.9% |
| 2023 | 627 | 13.4% |
| 2024 | 573 | 13.8% |
| 2025 | 592 | 14.7% |
What to check before buying a 1995 Sl
On a 1995 Sl, lighting & signalling is what the MOT record says goes wrong most — it appeared in 10.4% of tests. Check these areas before you commit.
- Lighting & signalling (10.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (4.6% 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.
- Emissions & environmental (4.5% 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 Sls pass their MOT?
85.0% of the 3,145 1995 Mercedes-Benz Sl MOT tests in this dataset passed — a 15.0% fail rate.
What is the most common MOT failure on a 1995 Mercedes-Benz Sl?
Lighting & signalling, recorded in 10.4% of tests, followed by brakes (4.6%).
Does the 1995 Sl get worse with mileage?
Its MOT fail rate rises from 9.6% in the 0-30k band to 20.8% in the 150k+ band.
Methodology & source. Based on 3,145 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.