| engine type | Original performance | Performance after tuning | Vmax | More efficient | price |
|---|---|---|---|---|---|
| SLK 200 | 120 kW (163 hp) 240Nm | 136 kW (185 hp) 300Nm | * | 22 hp | 420 |
| SLK 200 (with wheel) | 120 kW (163 hp) 240Nm | 147 kW (200 hp) 300Nm | * | 37 hp | |
| SLK 200 | 135 kW (184 hp) 250Nm | 154kW (210hp) 300Nm | * | 26 hp | 420 |
| SLK 280 | 170 kW (231 hp) 300Nm | 185 kW (252 hp) 330Nm | * | 21 hp | 499 |
| SLK 300 | 170 kW (231 hp) 300Nm | 184 kW (250 hp) 330Nm | * | 19 hp | 499 |
| SLK 350 | 200 kW (272 hp) 350Nm | 218 kW (296 hp) 380Nm | * | 24 hp | 549 |
| SLK 350 | 224 kW (305 hp) 360Nm | 242 kW (329 hp) 390Nm | * | 24 hp | 549 |
| SLK 55 AMG 7G-T. | 265 kW (360 hp) 510Nm | 283 kW (385 hp) 540Nm | * | 25 hp | 549 |