First I would start with checking/testing of the charging system.
Ensure the battery is being fully charged by the alternator.
If charging system is good, proceed with checking for parasitic drains.
Somethng could be remaining turned on and the most common causes are stuck relays, keeping some component running without the ignition. Note if any component is not turning off, eg fans, illumintion lights etc.
Use an ammeter to check the drain when ignition is turned off. Anything less than 0.005 amp acceptable whereas a higher draw means something is wrong.
As to getting the ignition key out, symptoms indicates a likely fault with the shift interlock cable adjustment.
Is your vehicle column or floor shift?
Tuesday, April 19th, 2011 AT 8:10 PM