I have a 2007 c230 amg. The car runs great and cranks right up when cold and I have no problems while I keep it running, but one it warms up and I turn it off it will not crank back up till it cools down after a few hours. I ran my code reader and picked up these codes and I am stumped. I work on cars a lot but not Mercedes any help is greatly appreciated.
P0020
P0446
P0300
P0040
P0410
P0446
A buddy of mine said it all could be coming from the camshaft position sensor or the actuator.

 

Hello, First of all , back to basics. Do you have a clean set of battery terminals, and clams, lightly greased? Does the ground cable from the battery have a clean solid ground connection to the engine? Where I live road salt eventually messes electrical grounding points. Your ride is 9 years old and its a possibility and quick to check . Another one that your code reader will not find is a failing ignition key switch. Good luck Allan