Meet such problems Firmware is older than the installed program version, How to solve?
Method: you can follow this video to reinstall the vxdiag driver: https://mega.nz/file/uCox1TbT#HPla7yswufU8IYDNQUlDkiaUZSiUVp79BdhhUzLIiUY
1. Open vxdiag
2. click firmware
3. click update:
4. click diagnostic-benz c6
5. click update
6. click uninstall
7. click install
8. then finished