Mercedes Slk
Reliability, running costs, and MOT data across 21 years from 128,923 real MOT tests.
Avg Pass Rate
81%
Total Tests
128,923
Best Year
2016 (89%)
Years Covered
21
How reliable is the Mercedes Slk?
Mercedes Slk by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2016 | 89% | 2,572 | 42,977 mi |
| 2015 | 87% | 11,055 | 48,710 mi |
| 2014 | 87% | 11,284 | 55,581 mi |
| 2013 | 85% | 11,106 | 62,322 mi |
| 2012 | 84% | 13,361 | 64,940 mi |
| 2011 | 85% | 5,660 | 61,469 mi |
| 2010 | 80% | 4,472 | 66,541 mi |
| 2009 | 81% | 5,347 | 71,532 mi |
| 2008 | 80% | 6,876 | 75,187 mi |
| 2007 | 79% | 7,700 | 77,695 mi |
| 2006 | 79% | 7,884 | 80,213 mi |
| 2005 | 78% | 10,305 | 82,791 mi |
| 2004 | 78% | 6,598 | 84,132 mi |
| 2003 | 78% | 3,327 | 85,438 mi |
| 2002 | 81% | 3,692 | 87,295 mi |
| 2001 | 82% | 4,005 | 90,848 mi |
| 2000 | 79% | 3,545 | 90,918 mi |
| 1999 | 79% | 4,295 | 87,626 mi |
| 1998 | 79% | 3,523 | 89,671 mi |
| 1997 | 81% | 2,190 | 90,802 mi |
| 1996 | 76% | 126 | 98,709 mi |
Checking a specific Mercedes Slk?
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About the Mercedes Slk
The Mercedes Slk has been tested 128,923 times in 2024 MOT data across 21 model years (1996 to 2016), with an average pass rate of 81%. That's close to the national average of 82%. Available as diesel and petrol.
Best and Worst Years
The 2016 model is the most reliable with a 89% pass rate from 2,572 tests. The 1996 model has the lowest at 76%. The 13 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
Newer MERCEDES SLKs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.
Mileage Across Years
The oldest model in our data (1996) averages 98,709 miles, while the newest (2016) averages 42,977 miles.
Compared to the Mercedes brand average of 87%, the Slk is 6 points lower, placing it among the less reliable Mercedes models.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.