Mercedes Sl
Reliability, running costs, and MOT data across 30 years from 50,180 real MOT tests.
Avg Pass Rate
89%
Total Tests
50,180
Best Year
2019 (97%)
Years Covered
30
How reliable is the Mercedes Sl?
Mercedes Sl by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2019 | 97% | 851 | 19,987 mi |
| 2018 | 93% | 1,022 | 25,750 mi |
| 2017 | 94% | 1,847 | 30,630 mi |
| 2016 | 95% | 2,240 | 36,109 mi |
| 2015 | 92% | 2,222 | 40,591 mi |
| 2014 | 92% | 2,892 | 47,357 mi |
| 2013 | 89% | 2,796 | 49,450 mi |
| 2012 | 90% | 1,136 | 50,476 mi |
| 2011 | 92% | 579 | 50,602 mi |
| 2010 | 88% | 955 | 62,402 mi |
| 2009 | 87% | 1,222 | 63,020 mi |
| 2008 | 90% | 1,940 | 65,610 mi |
| 2007 | 88% | 1,792 | 71,215 mi |
| 2006 | 87% | 1,832 | 73,640 mi |
| 2005 | 88% | 2,430 | 75,394 mi |
| 2004 | 88% | 4,036 | 77,676 mi |
| 2003 | 86% | 5,173 | 75,808 mi |
| 2002 | 88% | 2,083 | 74,421 mi |
| 2001 | 90% | 528 | 78,534 mi |
| 2000 | 86% | 955 | 84,195 mi |
| 1999 | 87% | 1,617 | 84,924 mi |
| 1998 | 86% | 2,018 | 89,595 mi |
| 1997 | 87% | 2,117 | 93,418 mi |
| 1996 | 88% | 1,778 | 93,971 mi |
| 1995 | 85% | 1,627 | 99,248 mi |
| 1994 | 88% | 1,244 | 93,271 mi |
| 1993 | 88% | 462 | 85,167 mi |
| 1992 | 87% | 312 | 90,571 mi |
| 1991 | 86% | 288 | 78,703 mi |
| 1990 | 81% | 186 | 88,429 mi |
Checking a specific Mercedes Sl?
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About the Mercedes Sl
The Mercedes Sl has been tested 50,180 times in 2024 MOT data across 30 model years (1990 to 2019), with an average pass rate of 89%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol.
Best and Worst Years
The 2019 model is the most reliable with a 97% pass rate from 851 tests. The 1990 model has the lowest at 81%. With a 16 point spread, choosing the right year makes a big difference to reliability.
Reliability Trend
Newer MERCEDES SLs 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 (1990) averages 88,429 miles, while the newest (2019) averages 19,987 miles.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.