You can find the chip tuning file for your Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 421 HP to 440 HP, 540 Torque to 565 Torque.