: Modifying VMAX (maximum speed limits) and lifting NOx torque restrictions on trucks using FDOK XT/XN calculation codes.
Most versions of the calculator are compatible with (up to 2018–2020 releases). For the latest Mercedes-Benz models (2021+), diagnostic protocols have become significantly more secure, often requiring newer Xentry Diagnosis Kit 5 hardware and official cloud-based authentication. Xentry Special Functions Calculator
To use these special functions, a technician typically follows this process: : Modifying VMAX (maximum speed limits) and lifting
: The calculator provides the correct response code, which the technician enters back into Xentry to unlock the function. Why Technicians Use It Xentry Special Functions Calculator