This was rumored already as part of Audi's Artemis project: https://www.electrive.com/2020/07/19/audi-planning-proprietary-charging-network-for-hi-tech-evs/
US prices are before taxes. In Europe you have to multiply with your applicable VAT rate (21% in Belgium). Because the €/$ rate and the VAT cancel each other out, you end up with the same headline number: €80K.
There are a lot of things that can go wrong in the "Electric System". Without an actual diagnosis the warning is just the same symptom. It might or might not indicate the same fault...