Mercedes W205 W222 W47 FBS4 mileage correction can be done via CGDI MB via OBD + bench mode in 30mins. X166 FBS4 can be done via CG100 and CAN Filter. Here is the tutorial on Mercedes GL400 X166 year 2014 V6 mileage correction via CG100. Vehicle information: Mercedes GL400 4Matic SUV US ModelEngine type: 276…