Hello. I apologize in advance for my English. I'm from Brazil and I own a Mercedes ML350 that uses the same alarm siren. I faced the same problem that Crossfire owners faced. I read your posts about it and also adopted a similar solution using the signal from the turn signal lights. But I was very interested in part 2, regarding the decoding of the K-line protocol. I would be very grateful if you could share your knowledge and the documentation of this project, especially the K-line protocol codes. I just joined the forum and I don't quite understand how it works, and this is the right channel. Thank you in advance and I apologize for any inconvenience.