ola ali

On the first i had problems with navi i bought actvichion for thet but after that when i close my car and turn on agine the scren on the back not work all the press not light
how can i fixt
The screen in the main is work very good

Bada Bing

I think your question is hard to comprehend, so this is why no one has responded. Maybe you can go back and edit it or re-phrase it, so it's clear what you are asking about. Since the D5 generation A8 is not currently sold yet, my guess is that your question has to do with an older generation A8 (if it is in fact related to an A8).