[pd0wm]

At some point the values have no deeper meaning and are just whatever VW decided on as their API. DBC files have concepts of enums, but that’s really diminishing returns and wouldn’t make the code that much easier to understand.

Also sometimes there are fixed values in the message that we’ve only observed as static data. Ironically that makes it impossible to reverse engineer what they mean. So those just have to be labeled as hardcoded value.

Those are actually magic. Those are the ECU firmware identifiers from the manufacturer that are used by openpilot to recognize which car it’s connected to.