1997 Mercedes-Benz E-Class — MOT failures & pass rate
2,267 MOT tests on the 1997 Mercedes-Benz E-Class are in this dataset, and 78.7% of them passed. That is effectively the same as executive cars of a similar age (22.3% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 15.8% of tests against 8.3% for the next-worst category.
At component level the recurring items are headlamp aim, catalyst emissions and stop lamp — headlamp aim alone was recorded 137 times.
A 150k+ example is materially riskier than a 0-30k one: 26.7% versus 11.8%.
Suspension is the most common advisory, noted on 31.5% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 15.8% | 357 |
| 2 | Suspension | 8.3% | 188 |
| 3 | Brakes | 7.0% | 158 |
| 4 | Visibility | 6.3% | 144 |
| 5 | Body, structure & corrosion | 5.2% | 118 |
| 6 | Emissions & environmental | 4.6% | 105 |
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 | 137 |
| 2 | Catalyst emissions | 122 |
| 3 | Stop lamp | 118 |
| 4 | Component mounting prescribed areas | 117 |
| 5 | Position lamp | 106 |
| 6 | Headlamp | 98 |
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 | 31.5% | 715 |
| 2 | Brakes | 30.0% | 680 |
| 3 | Tyres | 21.0% | 476 |
| 4 | Emissions & environmental | 15.8% | 359 |
| 5 | Lighting & signalling | 14.7% | 333 |
| 6 | Body, structure & corrosion | 13.9% | 316 |
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 | 34 | 11.8% |
| 30-60k | 215 | 16.3% |
| 60-90k | 616 | 18.7% |
| 90-120k | 576 | 21.7% |
| 120-150k | 420 | 22.9% |
| 150k+ | 401 | 26.7% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 1,787 | 22.2% |
| Diesel | 480 | 17.9% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 617 | 20.6% |
| 2022 | 554 | 22.0% |
| 2023 | 444 | 21.2% |
| 2024 | 350 | 23.1% |
| 2025 | 302 | 19.5% |
What to check before buying a 1997 E-Class
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 15.8% of tests. Start there.
- Lighting & signalling (15.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (8.3% 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 (7.0% 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 1997 Mercedes-Benz E-Classs pass their MOT?
78.7% of the 2,267 1997 Mercedes-Benz E-Class MOT tests in this dataset passed — a 21.3% fail rate.
What is the most common MOT failure on a 1997 Mercedes-Benz E-Class?
Lighting & signalling, recorded in 15.8% of tests, followed by suspension (8.3%).
Does the 1997 E-Class get worse with mileage?
Its MOT fail rate rises from 11.8% in the 0-30k band to 26.7% in the 150k+ band.
Methodology & source. Based on 2,267 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.