Sorry, but I was also able to read from the error message that there is a problem between the ABS and engine control units.
With my question, I was trying to find out what kind of error it might be (e.g., a loose cable connection, a faulty sensor, etc.).
Furthermore, it would be interesting to know if I should take it to the workshop. It could also be a fault that occurs occasionally but is not significant, as it only appears temporarily due to environmental factors.
Regarding the other question:
Have you ever tried searching for 'VAG Com' along with terms like 'help' or 'instructions'?
I don't think it's useful to look through 7 pages, especially when they only contain topics that are unlikely to be helpful.
After browsing through several topics where I couldn't find anything relevant to the subject, I had to give up

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I also didn't find anything in the error database.
A simple answer like 'Yes, such guides exist' or 'No, they don't, because the program is only intended for workshops in conjunction with repair manuals' would have been sufficient.
Perhaps I didn't express myself clearly.
A small workshop would be great. It should cover the task at hand, the applicable equipment, and the procedure. In short, the things that are needed and can be accessed in everyday operations.
I don't have as much knowledge about diesel engines as many people here, but I hope that the more experienced members will help those who are new to the topic.
I hope I'm not asking too much

.
Greetings from Berlin.