Mercedes Benz Sl (2015)
2015 Mercedes Benz Sl
CarHunch analysed 849 real MOT records for the 2015 Mercedes Benz Sl. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2015 Mercedes-Benz SL is significantly more reliable than the UK average, with a 91.6% first-time pass rate compared to 80%, though nearly 29% of these vehicles have recorded a dangerous defect at some point—a noteworthy concern for a premium sports car. The 0.78 average failures per vehicle is reassuringly low, suggesting most issues are minor when they do arise.
At just over 31,000 miles on average, these cars are lightly used for their age, which partly explains the strong pass rates. The 4.6 advisories per vehicle indicate routine wear items needing attention rather than serious faults, so budget for regular maintenance but don't expect structural surprises; before buying, request the full MOT history to check what that dangerous defect flag represents.
What to check before buying a 2015 Mercedes Benz Sl
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- ⚠️ 28.9% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Mercedes Benz Sl
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (100%) | 847 | 91.6% | 0.78 |
| Diesel (0%) | 2 | 100% | 0 |
Mileage Distribution
Most 2015 Mercedes Benz Sl vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2015 Mercedes Benz Sl vehicles fall between 19,624 and 39,414 miles.
2015 Mercedes Benz Sl — Still on the Road
Strong survival — 754 vehicles still getting MOTs in 2025, 94% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2018–2025.
MOT History Averages
Most Common MOT Issues — 2015 Mercedes Benz Sl
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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22.8%
Nearside Rear Tyre worn close to legal limit/worn on edge
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22.3%
Offside Rear Tyre worn close to legal limit/worn on edge
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16.2%
Offside Front Tyre worn close to legal limit/worn on edge
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15.5%
Nearside Front Tyre worn close to legal limit/worn on edge
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15.4%
Nearside Front Tyre slightly damaged/cracking or perishing
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15.4%
Offside Front Tyre slightly damaged/cracking or perishing
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11.1%
Offside Rear Tyre slightly damaged/cracking or perishing
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10.5%
Engine MIL inoperative or indicates a malfunction
Data covers a 3-year window centred on 2015. Counts include advisories and failures.
Found a specific Mercedes Benz Sl?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.