Where is secondary battery in a8L
 

I have error on telemetrics, The issue is "secondary battery level low" and i cant find location in car so i can buy and replace :Confused:
help can be with user manual or something
engine is W12

Could it be the telemantics control unit battery? Telemantics unit should be inside the boot lid roof.
Here are some pdfs from ElsaWin.

Thank you, i will study this and try to resolve this. Yes Telematics :D my bad

I will try to find the instructions for coding the unit into 'service mode' before removal. I tried earlier but the link in elsawin didnt work.

Hi all, have been long time since i was here.
I was busy but did not stop taking care about my w12.
Problem was solved easy. I have buy another telematic unit and replace it.
So thank you all for support.

I just vent mad and unplug unit and replace it. Didn get enough patient with it. And it all went ok.