So far NOTHING i've done has made any difference, doing a search on the MMI and issues brought a few interesting bits.
https://www.audiworld.com/forums/a8-...2835919/page6/
Similar issue, long thread, down at the bottom it mentions the Phone was the problem, also says corrosion and water and right location!
https://www.audiworld.com/forums/a8-.../#post24817841
Has some interesting stuff. A bit of test pressing buttons with the CD player out, which should be easy
I'm now wondering about the phone???
" the initial logo should be there because the MMI HEAD has two paths of communication it communicate via MOST and CAN. see photo below, so with the MOST down the screen should trigger for a few seconds then blank because it switches over to MOST after the init wakeup via can or MMI PAD which in your case is dead.... its not doing that the head or can lines is dead, I seriously doubt its the can lines...
7 of the 13 wires in the head is a direct connection to the MMI PAD E380
the rest is power mute for Telematics and can."
I'm getting that MMI turn on....strange that the MOST test in VCDS seems to say all good though
