FHEM MQTT2_SERVER and second Car

[PeterJuergens]

Hi Till,

I would describe myself as an experienced user of various open source projects, i.e., a user. I have made minor adjustments before, but it's mostly trial and error.
VDR, YCAST, FHEM, HA-Bridge, ZIGBEE2MQTT, a little hardware tinkering, a little Arduino, 3D printing

With the switch from PI4 to PI5, I wanted to switch from WeConnect to CarConnectivity.
I installed these four packages as follows:
pip3 install CarConnectivity-cli carconnectivity-connector-volkswagen carconnectivity-plugin-mqtt CarConnectivity-plugin-webui

carconnectivity.json

1. In the WebGUI, a second car is displayed that is assigned to my account, but I am not the main user and there is no data.
   In WeConnect, it is complete, just like my own car with all the data.

2. Furthermore, I cannot establish a connection to FHEM via MQTT.
   It works fine with WeConnect. No connection can be established between the MQTT2_SERVER and carconnectivity-plugin-mqtt.

Do you have any ideas about these two issues? Can I provide any further information to help identify the problem?