Skoda Rapid Diesel Electrical Problems

That sounds familiar. I had a similar issue with my Skoda Octavia. Random system failures and the malfunction indicator lamp lighting up drove me crazy. The BUS system you mentioned is basically the car's central nervous system; all the control units communicate through it. If there's a bad connection, things go haywire. Have you checked the error memory with an OBD-II scanner? That might give you a more specific idea of which control units are affected.

The OBD-II scanner shows a bunch of errors, mostly related to audio and navigation. What exactly was the issue with your Octavia?

I had the same symptoms. It turned out to be a corroded connector on one of the CAN bus wires near the central control unit. These are twisted pair wires used for communication, and the connections need to be solid. I tried cleaning it myself, but it was too far gone. I ended up taking it to a workshop. They replaced the connector and re-terminated the wiring. It's best to get it checked by someone who knows what they're doing, especially with the CAN bus system. A faulty connection can cause all sorts of problems.

The workshop visit confirmed a cable fault. 155€ later, the car is running smoothly. Thanks for the advice.