Hi all, I started encountering this same issue in December 2019. Took it to Audi, two long visits (total of 16+ days) split over 2 appointments. I have a 2017 Technik, A3 e-tron, took possession in January 2017 (I'm in Vancouver, BC, Canada). Here's what they came up with so far which is still unacceptable to me.
- They tried an extended road test and overnight testing
- They couldn't figure out the issue and had to escalate to techline in Germany eventually.
- The battery has degraded a little over time (94-95% capacity). Not surprising.
- Battery is not reaching 100% anymore so the car continues to charge. They said "it may draw a little power, but it should use full charge".
- Direct quote that they consider a resolution: "It passes requirements and no further action at this time is required"
I'm continuing to press as I don't find this acceptable. I have another EV (5 year old Nissan Leaf) and as I'm sure with other people, many other electronic devices that indicate when charging is complete even when a degraded battery is full. Seems like a few of you are seeing this as well so I would take it back to Audi, share this information and perhaps we can get a more acceptable fix.