We have a customer whose MB SD Connect C4 diagnostic system runs great but suddenly require an VCI upgrade.
He rename the VCI update file, but still failed to run Star diagnostic self test (Error screenshot attached)
Solution:
Re-install mb sd c4 battery, update MB SD C4 firmware to V2.3.2.
Some users feedback that SDConnect from OBD2TOOL with serial number 101044 will take firmware update risk. If you use our DAS software without internet connection, it will work.