| engine type | Original performance | Performance after tuning | Vmax | More efficient | price |
|---|---|---|---|---|---|
| CLK 200 | 100 kW (136 hp) 190Nm | 112 kW (152 hp) 210Nm | * | 15 hp | 349 |
| CLK 200 K. | 120 kW (163 hp) 230Nm | 132 kW (197 hp) 250Nm | * | 34 hp | 349 |
| CLK 200 | 125 kW (170 hp) 250Nm | 147 kW (200 hp) 290Nm | * | 30 hp | 349 |
| CLK 230 K. | 142 kW (193 hp) 280Nm | 169 kW (230 hp) 310Nm | * | 37 hp | 449 |
| CLK 240 | 125 kW (170 hp) 240Nm | 135 kW (184 hp) 260Nm | * | 14 hp | 399 |
| CLK 270 | 119 kW (163 hp) 370Nm | 147 kW (200 hp) 450Nm | * | 37 hp | 449 |
| CLK 320 | 160 kW (218 hp) 310Nm | 176 kW (240 hp) 335Nm | * | 22 hp | 449 |
| CLK 430 | 205 kW (279 hp) 400Nm | 221 kW (300 hp) 425Nm | * | 21 hp | 449 |
| CLK 500 | 225 kW (306 hp) 460Nm | 240 kW (326 hp) 490Nm | * | 20 hp | 449 |
| CLK 55AMG | 270 kW (367 hp) 510Nm | 288 kW (392 hp) 540Nm | * | 25 hp | 699 |
| CLK 55AMG | 255 kW (347 hp) 510Nm | 270 kW (367 hp) 535Nm | * | 30 hp | 699 |
| CLK 63 AMG | 354 kW (481 hp) 630Nm | 390 kW (530 hp) 660Nm | * | 49 hp | 699 |
| CLK 63 AMG | 374 kW (508 hp) 630Nm | 390 kW (530 hp) 660Nm | * | 22 hp | 699 |