So I have had a problem with my ECU shutting down on my 2014 ML350 Bluetec. I am using Ktag and ECM Titanium. I am wondering if this could be caused because I didnt do anything with Checksum? When I open ECM Titanium it says checksum no. Do I need to do something with that and if I didnt could that be why my ECU sometimes just glitches and I have to turn the car on and off to get going. What does the checksum part of ECM Titanium do?

KTag sort your chks problem out.
But the problem could be chks... so, read file with ktag again and post ori and reread file and if there is problem you should talk to support from tool.