Mercedes Sls
Reliability, running costs, and MOT data across 5 years from 766 real MOT tests.
Avg Pass Rate
97%
Total Tests
766
Best Year
2013 (100%)
Years Covered
5
How reliable is the Mercedes Sls?
Mercedes Sls by Year
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About the Mercedes Sls
The Mercedes Sls has been tested 766 times in 2024 MOT data across 5 model years (2010 to 2014), with an average pass rate of 97%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol.
Best and Worst Years
The 2013 model is the most reliable with a 100% pass rate from 57 tests. The 2010 model has the lowest at 94%. The 6 point spread between years means reliability varies somewhat, but no year is dramatically different.
Reliability Trend
Newer MERCEDES SLSs 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 (2010) averages 18,857 miles, while the newest (2014) averages 8,376 miles.
Compared to the Mercedes brand average of 87%, the Sls performs 10 points better, making it one of the more reliable options in the Mercedes range.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.