Nermb

Hello all.
​​​​​​So I just changed my battery on my 2013 A8L 4.0T. The original was a 105Ah AGM varta battery and I installed a Duralast Platinum H9 AGM that's rated at 100Ah. After programming on VCDS, I realized there is no option for 100Ah only 105ah, 115Ah, 92Ah, etc. I left it as 105Ah but now my question is.. How would this affect the new battery or possibly alternator? Will it cause the alternator to work harder? Should I set it to 92Ah (thinking maybe its better it doesn't get fully charged/less outpyt compared to getting overcharged/higher demand from vehicle) so it's lower or it doesn't really matter?
First time changing the battery on this car so I'm a little confused with the options and programming, possible side effects of different battery than programmed, etc. Previous battery looked like it was the original (I'm the 2nd owner so I doubt the first owner changed the battery during their lease). Any help would be greatly appreciated.

A8L_New_England

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Who even knows if a new Varta battery eight years ago had the same electrical characteristics as your new Duralast Platinum H9 ?
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Nermb

You're most likely right as technology changes all the time. My only concern was the slight amp hour difference that's programmed onto the computer compared to the amp hour the battery is capable of

A8L_New_England

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My gut feeling is that it probably won't cause any issues. See if this link works:
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https://www.audiworld.com/forums/a8-...edure-2913568/
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"Search" is your friend
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