Mercedes Benz Slk (2013)
2013 Mercedes Benz Slk
CarHunch analysed 4,945 real MOT records for the 2013 Mercedes Benz Slk.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2013 Mercedes-Benz SLK passes its MOT first time at 85.5%, which is above the UK average of 80%, suggesting better-than-average reliability—though the 42.7% dangerous defect rate is a serious concern and well above typical for the market, signalling potential structural or safety issues that buyers must investigate carefully. Petrol models perform notably better at 88.1% pass rate versus diesel at 84.5%, so fuel choice matters here.
At 46,366 miles median, these cars are well-used for their age, yet they're still averaging 1.78 failures per MOT and 10.1 advisories, which points to cumulative wear on electrical systems and trim rather than fundamental mechanical problems. Before committing to one, get a full independent inspection focusing on convertible roof mechanisms, suspension components, and any history of electrical faults—the high dangerous defect prevalence suggests this isn't a car to buy sight-unseen.
The 2013 Mercedes Benz Slk has a decent first-time pass rate (85.6%), but a higher-than-average share of vehicles have had serious defects recorded — the individual vehicle's history matters a lot here.
These stats describe 4,945 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
What tends to go wrong
Across 4,945 vehicles — figures show how many had each issue flagged at least once in their MOT history.
Data covers a 3-year window centred on 2013.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 4,945 Mercedes Benz Slk cars.
Petrol vs Diesel
Pass rate difference of 3.6 percentage points — worth knowing if you're choosing between the two.
Before you buy a 2013 Mercedes Benz Slk
Based on MOT data from 4,945 vehicles — here's what to check.
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Check the full MOT history.
42.7% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (72%) | 3,583 | 84.6% | 1.92 |
| Petrol (28%) | 1,362 | 88.2% | 1.42 |
Colour Breakdown
Based on 79,588 Mercedes Benz Slk vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2013 Mercedes Benz Slk vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2013 Mercedes Benz Slk vehicles fall between 35,501 and 59,432 miles.
2013 Mercedes Benz Slk — Still on the Road
Almost all 2013 Mercedes Benz Slks are still on the road.
Strong survival — 4,309 vehicles still getting MOTs in 2025, 92% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2015–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.
MOT History Averages
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Compare with another model
See how the 2013 Mercedes Benz Slk stacks up against a rival.