This is CAS3 Programmer Mileage Correction for BMW CAS OBD2 II. Mileage correction for BMW CAS / MB EZS / DASHBOARDS / MODULES / with 912 / 9s 12 / 9s 12x MCU, in circuit programming (no need removing mcu ), can read / edit / write eeprom of MCU, mileage calculation integrated in soft.