Where to find drain plug to get water out of your battery compartment & how to uninstall the battery from your Audi A4. Plus the tools you will need.⭐ ️Sub AudiA4 B8 8k OBD2 port LOCATIONOBDII LOCATION#Audi #A4 #DiagnosticPort #OBD. CommonBattery Locations of Audi A4. To make it even easier for you, here are to most common battery locations of the battery in an Audi A4. 1. In the trunk, under the spare tire 2. At the center of the firewall on the engine block 3. At the right part of the. Step 2: Gain Access to the Old Battery that Needs to Be Replaced Howto replace your air filter in an Audi A4 B9.#Audi A4, #audi , #audia4b9, #howto Thisjust happened to me yesterday morning to my 09 S5! I just happened to find this post after frantically searching the internet for an answer. Just about the same symptoms. 3.82 volts from the battery. I had just driven and parked it less than 24 hours before and everything was fine. Now it was dead to rights. Posts 947. Likes: 1. Received 283 Likes on 222 Posts. As noted, yes to adapting the charging controls for your new battery. The car will run without the adaptation; but, your new battery may not stay new for very long. OEM battery on the B9 should be AGM and you should replace with AGM. I don't know about pre B9 A4s; but, the B9 1 You don't need to remove the switch to get rid of the warning, you just have to disconnect it. On some models A4 the detector is part of the latch mechanism, on others (depending on model year) it's on a separate push-in catch near the latch. You can see a cable going to it with a modular connector. #1. G86EVO. Verified VCDS User. Joined. Nov 15, 2020. Messages. 11. Reaction score. 8. Location. UK. VCDS Serial number. C?ID=334199. Hi everyone, I 2kORGV.