Has anyone else experienced dead battery problems on their 300. I had my car 4 months and went to start it battery was dead dealer did battery test all was good. Today got in the car after sitting for 3 days and the battery is dead again, after jump start egine light was on. Took right to dealer not codes other then power surge and dead battery, battery tested good. I did notice that when I attached the jumper cables the wipers started running when they wren't turned on. If anyone has any suggestions I'd appreciate it.

 

Hi yfd76,
Do you have any aftermarket electrical mods that might be drawing the power from the battery or is your vehicle stock?

 

This is a complete stock car we didn't alter the car and we don't have anything pluged in.

 

If you have a volt-ohmmeter with current measuring capability, see if you can check for current draw with everything turned off. It should be less than 50 milliamperes (0.050 amperes). This level of current draw represents the current for the clock and the remote key receiver. If it's more than that, you have something on somewhere that shouldn't be on or you have a short somewhere. Pull fuses one at a time until you isolate the rogue current draw. Then you will have to figure out what on that circuit is causing the problem. The list of fuses in the owners manual will narrow it down for you.
Keep in mind it could be something simple like an interior light left on, or it could be some internal problem in a component.
This stuff isn't rocket science and using a logical approach you might be able to at least narrow down the problem so you aren't paying a technician $100 an hour to do something you can do yourself. If you start the process but still can't find the problem, at least be sure to tell the technician what you have done so he doesn't duplicate everything that has already been done.

 

I could do that but the car sits under a carport so I know no lights are left on. The car is still under warranty so I don't want to mess with anything. I just wondered if anybody else experienced this problem.