Audi A6 C7 MMI intermittent and Key not recognised

[Paidi66]

Hi all,

Appreciate any reply to this but I’m very stuck for advice. Recently my 2014 A6’s MMI has been functioning for the first half hour of a journey then it shuts down and refuses to come back up.

I found water in the boot/trunk and brought to Audi who said there was a fault in the fibre optic loop.

They want ridiculous money to investigate it and I’d really appreciate some tips. I have Bose sound system if that makes any difference. 
 

Thanks for viewing.