vxdiag benz C6 Problem:
System error (s)
Fault (2.27) -7.870
Serious fault! Please contact the User Help Desk.
Then install the C6 VCI Manager driver, it says initialization of the multiplexer failed.
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https://mega.nz/file/zAQyXBKJ#Sh4X5o-QTz5mFVIXTAqi1_sVlIi0vO3fhHgze8-LuXs
Hope it helps!