The current Mercedes-Benz CLK covers up to 969 km on a full tank, based on combined-cycle consumption. Figures below are the best-range variant in each generation.
| Years | Powertrain | Range |
|---|---|---|
| 1997–1999 | Combustion | 660 |
| 1999–2002 | Combustion | 667 |
| 2002–2005 | Combustion | 925 |
| 2005–2009 | Combustion | 969 |
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.