FOR MERCEDES BENZ POWER BOX Chip Tuning ECU Remapping Remap Performance Upgrade Benzine Car Auto Fuel Optimization More Power and Torque OBD 2 PLUG AND DRIVE CHIP TUNING BOX Plug & Drive Ready Device For Increasing and Switching ON Hidden Engine Power. Easy to install. NOTE: Increasing of the power and torque depending of your car's model and driving habits can be different Plug and Drive OBD2 CHIP TUNING BOX More Power, More Torque According to your driving habits, CHIP TUNING BOX makes new map in the car's computer ECU to increase the performance of your car.OUR CHIP TUNING BOX does not exceed the manufacturer's requirements. It works only within the tolerance of the engine. THIS CHIP TUNING BOX does not damage the engine and the car's computer ECU or not cause any negative effects to the car factory setting. This CHIP TUNING BOX does not change any of the settings permanently. To turn back to the car's original settings, just unplug CHIP TUNING BOX from OBD2 connector.