CAN Bus Mercedes C-Class (W204)

hello everyone,

I've done a little research in various forums (car-pc.info, mercedes-forum.com, and here), and on websites.
researched, but couldn't find a complete answer.
I would like to know how to connect my car PC to the CAN bus of my car.

It's a Mercedes S202.193 (or an older C-Class 220 CDI) model from the year 2000, with Euro 3 emissions standards.

In the engine compartment, there's a round 'socket' that the workshop uses to access the vehicle's data. However, my car radio should also have a CAN bus connection.
However, based on what I've read so far, my car doesn't have an 'in-cabin CAN' bus.

The PDF file on the Dietz company's homepage, which 'Fuchs' once linked to, no longer exists. I can only find general information about CAN-bus there now.

Therefore, here is the question.

P.S.: The combination instrument is controlled via CAN.

Sure, no problem!

Daniel.