2015 Mercedes-Benz Gt — MOT failures & pass rate
1,203 MOT tests on the 2015 Mercedes-Benz Gt are in this dataset, and 93.7% of them passed. All cars of a similar age fail 16.4% of the time, so this is 10.1pp better than the group it competes with. Failures cluster in tyres, lighting & signalling and emissions & environmental.
What the MOT record shows
No single area dominates — tyres (3.7%) and lighting & signalling (1.0%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are tread depth, registration plates and headlamp aim — tread depth alone was recorded 21 times.
A 60-90k example is materially riskier than a 0-30k one: 17.0% versus 4.0%.
Advisories point at the next bill rather than this one: tyres was flagged on 14.9% of tests without failing them.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.7% | 45 |
| 2 | Lighting & signalling | 1.0% | 12 |
| 3 | Emissions & environmental | 0.8% | 9 |
| 4 | Other defects | 0.5% | 6 |
| 5 | Visibility | 0.4% | 5 |
| 6 | Suspension | 0.4% | 5 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 21 |
| 2 | Registration plates | 10 |
| 3 | Headlamp aim | 10 |
| 4 | Catalyst emissions | 6 |
| 5 | Catalytic converter | 3 |
| 6 | Brake pads | 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 | 14.9% | 179 |
| 2 | Brakes | 3.4% | 41 |
| 3 | Visibility | 1.8% | 22 |
| 4 | Other defects | 1.6% | 19 |
| 5 | Lighting & signalling | 0.8% | 10 |
| 6 | Suspension | 0.6% | 7 |
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 | 768 | 4.0% |
| 30-60k | 388 | 9.5% |
| 60-90k | 47 | 17.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 249 | 6.4% |
| 2022 | 243 | 3.7% |
| 2023 | 236 | 8.1% |
| 2024 | 236 | 6.4% |
| 2025 | 239 | 7.1% |
What to check before buying a 2015 Gt
On a 2015 Gt, tyres is what the MOT record says goes wrong most — it appeared in 3.7% of tests. Check these areas before you commit.
- Tyres (3.7% 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 (1.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Emissions & environmental (0.8% 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 2015 Mercedes-Benz Gts pass their MOT?
93.7% of the 1,203 2015 Mercedes-Benz Gt MOT tests in this dataset passed — a 6.3% fail rate.
What is the most common MOT failure on a 2015 Mercedes-Benz Gt?
Tyres, recorded in 3.7% of tests, followed by lighting & signalling (1.0%).
Does the 2015 Gt get worse with mileage?
Its MOT fail rate rises from 4.0% in the 0-30k band to 17.0% in the 60-90k band.
Methodology & source. Based on 1,203 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.