Chrysler Repair: car not starting after driving, chrysler 300m, voltmeter

Question
I have a 2003 chrysler 300m special, since I have had it . It will crank the first thing in the morning. But then it might crank in a few minutes, or the worst 5 hrs. Now, I think when I bump the ignition a couple of times it will crank. I figured this out after 4 years. The dealer told me when I had it they needed it to not work , in order to test it. Of course it would go months then without messing up. Now it is daily until , I figured out the bump the other day.
                              Edward

Answer
It sounds to me like an ignition switch intermittent. If you can show them reliable that should be an easy diagnosis. Is this the 300M with the LH body style that had been around for about 10 years? If so I have the wiring diagram and can tell you how to check that out with a voltmeter. If this no start only happens after a recent run and the engine is warm at the time let me know about that in particular.