Real MPG: Mercedes-Benz SL (2012 - 2020) SL 400
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33.6–36.7
Official MPG(NEDC)
28.8
Official MPG(WLTP)
27.5–38.0
Real MPG
31.0
Real MPGAverage
88%
of Official MPG(NEDC)
108%
of Official MPG(WLTP)
More engines available for this model:
| Engine | Official MPG (NEDC) | Official MPG (WLTP) | Real MPG Avg. | Real MPG % | |
| SL 350 | 37.7–39.2 mpg | - | 32.7 mpg | 85% | |
| SL 400 Mille Miglia | 36.7 mpg | - | - | - | |
| SL 500 | 28.8–31.0 mpg | 26.4 mpg | 25.6 mpg | 97%* | |
| SL 500 Mille Miglia | 31.0 mpg | - | - | - | |
| SL 63 AMG | 24.1–28.8 mpg | - | 18.5 mpg | 70% | |
| SL 65 AMG | 23.7–24.4 mpg | - | - | - |
Read the Honest John review...
Mercedes-Benz SL (2012 - 2020)
Impressively refined with a smooth ride. Folding metal roof means it’s as quiet as a coupe. AMG versions are brutally fast.
Rivals
| Mercedes-Benz SL (2012 - 2020) | 29.6 | avg mpg |
| Jaguar F-Type Convertible (2013 on) | 27.5 | avg mpg |
| MINI Roadster (2012 - 2015) | 40.8 | avg mpg |
| Vauxhall Cascada (2013 - 2018) | 40.8 | avg mpg |
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