I have a C230 that every so often will not start. If i wait 5/10/15 minutes it will start and run. Any suggestions on this issue or what could cause this to happen.

 

Does it do that when engine is hot? Crankshaft position sensor at the back of the engine?

 

wait in what way? battery wise or turning the engine on it self?

 

From your limited description, sounds like a bad CPS (crank position sensor) to me. I had a similar problem last summer. Cold start was no problem. As soon as the engine was warm, if I tried to start back up, the engine would crank over and over and over, and I would get a caution and OBDII code (can't remember the one off the top of my head), but it would never fire. After sitting for 20-45 mins, it would start up without a problem. It is a pretty easy DIY job for about $50 (cost of a new CPS) and maybe the price of the torx socket you need if you don't have a set handy already.