You can find the chip tuning file for your Mercedes-Benz CLS C257 - 2018 -> 400d (3.0D) 340hp 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 CLS C257 - 2018 -> 400d (3.0D) 340hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 340 HP to 410 HP, 700 Torque to 840 Torque.