My 2005 Mercedes C240 won't start or even turn over?

BLUF: My car will not start or even turn over. Both the battery and solenoid appear to be working. Please read below for the rest of the details. I am stationed in Daegu, Korea, there is no MB dealership near where I live.

I have a Mercedes-Benz 2005 C240. Until now I haven't had any problems with it; however, today it would not start. I parked it in an unauthorized spot as I only had to run upstairs, grab some papers and come back. I turned on the emergency lights and left it. 5 minutes later I went back, turned off the lights and went to start it. It did not even try to turn over. I used another car to give it a jump, but it still would not even turn over. The lights are still bright when I turn them on and no unusual indicator lights come on the dash. The solenoid clicks, but once again - it does not even turn over once.

My experience has taught me that it is likely the starter as both the battery and the solenoid have been isolated from the problem. However, experience has also taught me to expect the unexpected, I.E. something simple like a sensor not being set properly.

Once again, this has never happened before. Any recommendations will help. I will call the MB dealership when they open tomorrow.