For those who struggle with Google Translate: Charger plug, KLE and 12V battery were changed. The author questions some Quality Control aspects, which was to be expected.
The car stopped charging on a hot day after a loud "plop" noise and some strange smells. After that, the car started discharging and eventually was dead - even doors couldn't be opened.
The response from the dealership sounded top notch and within 8 days the car was returned, allowing him to drive to the seaside for a break.
Personally, I think this sounds like an unfortunate one-off.