Hi, i will work with project where i want to put w203 2000 instrument cluster (A1), upper control panel control module and climate control panel to my W460. So, i have can232 device with Atmel microchip and with this kit i want to read and emulate can messages needed to work with these modules. I already can read and write both B and C can bus messages and little bit emulate sam -s, but because Mercedes won't make these messages public i need to grab and decode them myself. But this is too hard or impossible, so i need to get these messages somewhere. A few messages i already found from internet such as left and right turn, lights etc but i can't find the most important messages such as speed, rpm, oli level and other messages from can C.
Can someone help me find these messages and sorry my bad english, thanks.

Karu