Hey folks.. lots of great info here. I have a C3 Clone and recently meet a T1N forum member who does not have cruise control (most likely a FedEx truck), has now installed all the hardware, and is looking to make the necessary ECM configurations. Currently I do not have the ability to do this adaptation. Is there a way to configure my C3 system to do this adaptation or is the c4 system with SCN coding ability needed?
You need to change the version coding (via SCN). This requires someone with access to mercedes home computer, as the code change requires a password type string, which is generated at mercedes based on the input string from your ECU/ECM. There are some videos on offline SCN coding if you do a google.
C3 units have the ability to do offline SCN coding. However depending on what version of the xetnry/star software you have, you may need to load a patch to enable it. You can do a few googles. You are looking for "offline scn patch MM-YYYY" etc. where MM-YYYY is the month/year of the software you are running. you may need to change the search terms around a bit. There are a couple of forums which have quite of bit of info on supporting these cloned star units.
Once you have offline SCN coding available, your best bet is to contact one of the chinese SCN coding providers. They will connect to your star unit via teamviewer, and perform the offline coding using there account remotely.
Alternatively you can just pay a dealer to do it. I think I pad 150$ for mine at a sprinter friendly dodge dealer. I also got 3 keys programmed at the same time. They charged flat rate per hour for this.