Audi Navigation CAN Log: Data & Analysis

Hello,
ich suche nun schon seit wochen nach einer möglichkeit einen TV Tuner für mein NAVI + DX zu simulieren.
II can log and send CAN messages. However, since I don't have a TV tuner, I can only log the data that comes from the navigation system.
Through searching here in the forum and measuring (enabling pin to 12V), I have now found out:

- the navigation system sends approximately 1 time per second (a total of 10 times) when it is turned on:

id: 0x464 length: 3 rtr: 0 data: 0xe0 0x01 0x00

after that, nothing more.

On the internet, I found a post suggesting that one should send:

id: 0x264 length: 2 rtr: 0 data: 0xa1 0x01

every second.
Unfortunately, my navigation system does not respond to this. No button presses are being sent. However, in the menu, it says 'TV tuner' is ok.

I am looking for someone who can provide me with a log file that shows the login process for the navigation system.
Perhaps someone who could do such a measurement for me,
or who can somehow help me.
Although there are posts about which codes are sent for the buttons, I can't find anything definitive about the login process.
I can't find anything more by searching on Google. And here, as well as in <!-- m --><a class='postlink' href='http://www.navi-forum.net'>http://www.navi-forum.net</a><!-- m -->, I haven't found a comprehensive answer.

I am studying electrical engineering, and I would of course document my progress here and help others.
My personal goal is to build an MP3 player for the navigation system, because I don't like that the CD changer doesn't display tags.
I am from Cologne.
Thank you in advance for your help.

Robert.I can log and send CAN messages. However, since I don't have a TV tuner, I can only log the data that comes from the navigation system.After searching through this forum and experimenting (by enabling a pin at 12V), I've found out:- When turned on, the navigation system sends data approximately 1 time per second (a total of 10 times). id: 0x464, length: 3, rtr: 0, data: 0xe0 0x01 0x00 after that, nothing more.I found a post online that suggested one should check something every second. id: 0x264, length: 2, retr: 0, data: 0xa1 0x01 Unfortunately, my navigation system doesn't seem to respond to it. It's not registering any button presses. However, the menu displays 'TV tuner' as being okay.Perhaps someone will take a measurement for me.While there are articles discussing which codes are sent to the keys, I haven't found anything definitive about the login process.I'm stuck with Google. And here, just like in }}}}}, I haven't found a comprehensive answer.My personal goal is to build an MP3 player for the car's navigation system, because I don't like that the CD changer doesn't display track information.
I'm from Cologne, Germany.
Thank you in advance for your help.

RobeComing from Cologne.
Thank you very much for your help.

RobeThank you very much for your help.

RoberThank you very much for your help.

Hi Robert.

Do you want to trick your navigation system into thinking it's a (portable) MP3 player or a TV tuner? Or do you want to build something completely from scratch yourself?