2000 Mercedes-Benz S-Class — MOT failures & pass rate
The 2000 Mercedes-Benz S-Class passed 78.2% of its 2,223 recorded MOT tests. That is 1.9 percentage points better than executive cars of a similar age, which fail at 23.7%. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (12.5%) and suspension (11.2%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, ball joint and component mounting prescribed areas — headlamp aim alone was recorded 129 times.
Condition tracks the odometer closely. Failures run at 11.8% in the 0-30k band and 23.8% in the 150k+ band, a 11.9-point spread — more than double.
Brakes is the most common advisory, noted on 32.1% of tests — work that passed today but is likely due soon.
The trend is improving — the fail rate fell from 22.8% in 2021 to 17.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.5% | 278 |
| 2 | Suspension | 11.2% | 249 |
| 3 | Brakes | 6.4% | 142 |
| 4 | Visibility | 5.5% | 122 |
| 5 | Tyres | 4.7% | 104 |
| 6 | Seat belts & restraints | 4.5% | 100 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 129 |
| 2 | Ball joint | 118 |
| 3 | Component mounting prescribed areas | 101 |
| 4 | Headlamp | 90 |
| 5 | Washers | 81 |
| 6 | Tread depth | 77 |
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 | 32.1% | 714 |
| 2 | Suspension | 25.3% | 563 |
| 3 | Tyres | 23.3% | 517 |
| 4 | Lighting & signalling | 15.3% | 341 |
| 5 | Other defects | 13.6% | 302 |
| 6 | Emissions & environmental | 12.7% | 283 |
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 | 76 | 11.8% |
| 30-60k | 236 | 14.0% |
| 60-90k | 550 | 18.0% |
| 90-120k | 605 | 23.8% |
| 120-150k | 441 | 28.3% |
| 150k+ | 299 | 23.8% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 2,110 | 22.0% |
| Diesel | 113 | 17.7% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 684 | 22.8% |
| 2022 | 557 | 24.4% |
| 2023 | 439 | 20.1% |
| 2024 | 300 | 21.0% |
| 2025 | 243 | 17.3% |
What to check before buying a 2000 S-Class
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 12.5% of tests. Start there.
- Lighting & signalling (12.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (11.2% 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 2000 Mercedes-Benz S-Classs pass their MOT?
78.2% of the 2,223 2000 Mercedes-Benz S-Class MOT tests in this dataset passed — a 21.8% fail rate.
What is the most common MOT failure on a 2000 Mercedes-Benz S-Class?
Lighting & signalling, recorded in 12.5% of tests, followed by suspension (11.2%).
Does the 2000 S-Class get worse with mileage?
Its MOT fail rate rises from 11.8% in the 0-30k band to 23.8% in the 150k+ band.
Methodology & source. Based on 2,223 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.