The current Mercedes-Benz SLK covers up to 1,364 km on a full tank, based on combined-cycle consumption. Figures below are the best-range variant in each generation.
| Years | Powertrain | Range |
|---|---|---|
| 1996–2000 | Combustion | 582 |
| 2000–2004 | Combustion | 652 |
| 2004–2008 | Combustion | 805 |
| 2008–2011 | Combustion | 909 |
| 2011–2016 | Combustion | 1,364 |
Range is calculated from each variant’s fuel tank capacity and combined-cycle consumption (tank ÷ consumption × 100), for the best-range variant in each generation — real-world range varies with driving style and conditions. Figures outside a plausible range for the tank size are excluded.