HelloDREW-- The battery in the Audi A8 is located in the trunk on the passenger side. That design is meant to protect you from battery acid burns in the event of a front end collision. It happened to me in 1973 in a minor collision (my fault.) I hit the other guy at such an angle that my battery exploded and covered my legs with the battery acid. RTFMand you'll see that you shouldn't direct charge your battery. Just do your connection in the engine bay, on + and - charging terminals, as per the manual, and it works as intended and by Audi recommended. 2012 A4 B8 Avant 6MT F23L Custom Tune 3" 200 cell DP Sachs Performance Clutch. 02-15-2021 10:59 AM #3. Ive been noticing some slow starts recently and the battery went dead over the weekend while the inside of the car was being detailed (doors open for a couple of hours). Looks like it's time for a new battery. (there are some other VW/Audi platforms that it will). I looked at the OBDeleven website and it says that B8.5 S4 Avant B8S4; Help with Low Battery Warning; Results 1 to 8 of 8 Thread: Help with Low '15 Audi A3, '05 Camry Location Queenz/Westchester. My Photo Gallery: 0 ^^^ good advise, ask him also to do it preowned also. It's definitely abnormal. 2016 A4 Daytona Gray, Competition Plus, Tech Package. Gone: 2014 RS5 Sepang Blue on Lunar Silver, Received1,690 Likes on 1,438 Posts. The OEM bolt on the B8 platform is definitely a 19mm inner hex, not a 17mm. All B8 A4, A5, Q5, at least for the US, use the same bolt, 8E0407643A. You might find another M16x1.5x72 bolt on your car with a 17mm inner hex head, but it's not the bolt Audi AG assembled the vehicle with. Whereis an Audi's battery located? Within this video, I demonstrate how to find an Audi's battery in a 2020 Audi A4. Many other Audis place the battery in the 2014Audi Q7 Premium Plus, 2014 Audi A4 2.0T Quattro S-Line Location Ellicott City, MD. My Photo Gallery: 0 I'm still on my original battery in my 2010 B8 Part Battery Operation: Where is the battery located in the Audi A4? In this video, we can see where the battery is located in the Audi A4 B8 and how to proceed in case we C3yUSuA.