I'm trying to find tuning info on my wifes' 2010 MB w204 C200 CGi (i4 turbo) I've been told that it is a Siemens ECU and is locked which is why no tuners want to deal with it. That itself led me to this site and I am hoping to get some more information and to hopefully find a way to properly tune our car. Having said that, how do I read the info on the label of the ECU to even confirm that it is a Siemens? Thank you.