2017 Mercedes-Benz Gt — MOT failures & pass rate
Across 1,350 MOT tests analysed for the 2017 Mercedes-Benz Gt, the most common recorded failure areas were tyres, lighting & signalling and other defects. Its pass rate of 94.4% was above the average for cars of a similar age (87.6%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.5% | 47 |
| 2 | Lighting & signalling | 1.1% | 15 |
| 3 | Other defects | 1.0% | 13 |
| 4 | Emissions & environmental | 0.4% | 6 |
| 5 | Suspension | 0.3% | 4 |
| 6 | Road wheels | 0.2% | 3 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Registration plates | 23 |
| 2 | Headlamp aim | 12 |
| 3 | Tread depth | 11 |
| 4 | Catalyst emissions | 5 |
| 5 | SRS malfunction indicator lamp | 3 |
| 6 | Horn | 3 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 15.3% | 207 |
| 2 | Visibility | 2.5% | 34 |
| 3 | Other defects | 1.8% | 25 |
| 4 | Brakes | 1.5% | 20 |
| 5 | Suspension | 0.6% | 8 |
| 6 | Emissions & environmental | 0.4% | 5 |
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 | 1,155 | 4.5% |
| 30-60k | 180 | 11.7% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 269 | 6.3% |
| 2022 | 288 | 5.9% |
| 2023 | 265 | 5.7% |
| 2024 | 257 | 3.9% |
| 2025 | 271 | 5.9% |
What to check before buying a 2017 Gt
Before buying a 2017 Mercedes-Benz Gt, focus on the areas it most often fails on. Tyres accounted for 3.5% of tests for this year.
- Tyres (3.5% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Lighting & signalling (1.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Other defects (1.0% of tests): Miscellaneous items not in the main categories. Typical repair: varies.
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 2017 Mercedes-Benz Gts pass their MOT?
94.4% of the 1,350 2017 Mercedes-Benz Gt MOT tests in this dataset passed — a 5.6% fail rate.
What is the most common MOT failure on a 2017 Mercedes-Benz Gt?
Tyres, recorded in 3.5% of tests, followed by lighting & signalling (1.1%).
Does the 2017 Gt get worse with mileage?
Its MOT fail rate rises from 4.5% in the 0-30k band to 11.7% in the 30-60k band.
Methodology & source. Based on 1,350 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.