Mercedes SLS
Reliability, estimated running costs, and MOT data across 5 model years from 766 MOT tests in 2024.
Avg Pass Rate
97%
Total Tests
766
Highest Pass Rate
2012 (97%)
Years Covered
5
About the Mercedes SLS
The Mercedes SLS was MOT tested 766 times in 2024 (DVSA data, retests included) across 5 model years (2010 to 2014), with an average pass rate of 97%. That's comfortably above the average of 82% across all models in our data. Our records list petrol versions.
Best and Worst Years
Of the years with at least 100 tests, the 2012 model has the highest pass rate at 97% from 119 tests. The 2010 model has the lowest at 94%. With just a 3 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Reliability Trend
The Mercedes SLS has maintained consistent MOT pass rates across model years, varying by only 2 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.
Estimated Running Costs
Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.
Full 2014 detailsHow reliable is the Mercedes SLS?
Mercedes SLS by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Mercedes SLS
Is the Mercedes SLS reliable?
Across its 5 model years in our data (2010 to 2014), the Mercedes SLS averages a 97% MOT pass rate, from 766 tests (DVSA MOT data for tests in 2024, retests included). That's 15 points above the average of 82% across all models in the same data. The 2012 model has the highest pass rate of the years with at least 100 tests, at 97%.
Which year Mercedes SLS has the best MOT pass rate?
Of the years with at least 100 tests, the 2012 Mercedes SLS has the highest MOT pass rate at 97%, while the 2010 model has the lowest at 94%, a 3 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Are newer Mercedes SLSs more reliable?
The Mercedes SLS has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
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