jesus h chrysler
 

very nice to drive very nice to look at,runs great once you get it started.when 1st or 2nd start up of day the fuel pump relay and the automatic shut down relay are actuating say back and forth.starts out fast clicking,at this time you cant start,it sounds like batt. is dead.the relays eventualy start to slow in tempo still will not start only when the clicking stopped.a mechanic advised to change pcm and tcm.so since then i found the relay noise to subcide faster if i apply heat under cruse controll unit towards pcm,tcm.also when its in the clicking mode,if you turn key to off pos.the relays stop but under the throttle body and intake you still hear something actuating a few minutes longer.

Not sure if there's a question here or not. If there is, why don't you try posting it in the forum for Chrysler 300 issues, rather than here, which is for forum issues.