Audi A4 Avant B8, Model Year 2011, Comfort trim, CAN bus ID

Hello everyone,
"Does anyone here have information about the CAN bus IDs for the Audi A4 Avant Comfort system? Specifically, I'm looking for the ignition (terminal 15) ID of the message transmitted on the comfort CAN."
Thank you very much in advance, and Merry Christmas to everyone.

Hi,
You can try using this ID.
0x3C0

Ignition:
byte[2] = 0x07;

Hello Paulius, thank you very much for your answer; I really appreciate it.
I will try it as soon as possible and let you know the result.
In the past, I've observed a correlation between the value of byte [7] in the 0x3A3 ID and the ignition status.
So, the byte value was 0x00 when the ignition was off, and 0xFF when the ignition was turned on.
"But I wasn't completely sure if that was the right video to watch..."
"Thank you again."

Giallino wrote:

Hello Paulius, thank you so much for your answer; I appreciate it a lot. I will try it as soon as possible and let you know the result. In the past, I've observed a correlation between the value of byte [7] in the 0x3A3 ID and the ignition status. So, the byte value was 0x00 when the ignition was off, and 0xFF when the ignition was turned on. "But I wasn't completely sure if that was the right video to watch..." Thank you again.

No problem .
In CAN traffic, you'll observe many IDs that change along with the ignition state. This is because you're seeing not only the ignition status itself, but also the status of various ECUs (like the climate control system), which become active when the ignition is turned on.

"Normally, the ignition signal is just one bit. In my example, it's three bits because I'm checking three statuses simultaneously: ACC (switch contact), ignition, and terminal 75."

ID 0x3A3 originates from the engine control unit (ECU).
Your device indicates a status of "ready." A value of 0xFF signifies 100% readiness (or something similar).

This is the reason why I'm writing here. I wasn't completely sure that the byte at address 0x3A3 directly represented the ignition status; it's almost true and related to the ignition switch, but it's not entirely accurate. As soon as I have some time, I will look for the data at address 0x3C0.
"Thank you again, and I apologize for writing in English; my German is not very good."