How do I complete a drive cycle for my 2012 Mercedes C250?

What is your question?

I do not have any secondaries or any issues with the car. A new engine got put on the car and i have been driving it over months and just hit a little above 3K miles and still the only monitor that is not ready is the Fuel monitoring system. I have taken several long trips just in hopes that the monitor will clear. but still the same issue.

What makes this problem better or worse?

no issues

How long has your 2012 Mercedes-Benz C250 had this problem?

over six months and still the fuel monitoring system is not ready.