dvs_dave

Yep, almost certainly your battery has failed.

Replace it with the new one you have and remember to code it properly. Plenty of "how to" posts on this forum.

Once you've done that, clear all your DTC's, go for a drive and then run another scan and let us know how you got on!

ltooz_a6_a8_q7

and the MMI shows 100% and it still knows the battery is old and needs to be changed? I know one thing, battery doesn't have memory component inside so the car can read old and new id... Sometimes, the logic isn't there.
Amazing Audi Technology... really makes me go "hmmmmmmmmmmm...."
If the new battery fixes the flashing lights, I do need to visit Audi school.

Cheers,

Louis

MP4.2+6.0

Pretty well known that D3 starts to flake in many systems if battery is whack.

What you can see in VCDS--not mine, just an image I pulled from web.

MP4.2+6.0

Yes, this is sounding like battery is toast FWIW.

cyrus89

Bought new battery,Varta 95mAh, but havent installed it yet, I hope the deal is worth it

cyrus89

I ment 95Ah.

cyrus89

I installed the battery but I cant code it beacuse there arent any part or serial number only this

707chris

I had to reread the instructions a couple times doing it myself.
http://wiki.ross-tech.com/wiki/index.php/Audi_A8_%284E%29_Battery_Replacement

When you're in the battery regulator click 'battery coding' and alter the existing serial number by a single digit. Easiest way to explain it.

cyrus89

I have read it too many times but there is only basic information, but my battery doesnt have BEM code or serial code what I have to insert.

707chris

You won't be able too until you click on 'Coding' and then 'Long Coding Helper'.
You need to get to this window.


Once you get to this window its as easy as altering the last digit of the serial number.