What does the r k e battery light mean on a 2005 Chrysler 300?

The "r k e" light on your 2005 Chrysler 300 stands for "remote keyless entry." This light indicates that the remote keyless entry system is active and functioning properly. When you press the lock or unlock button on your key fob, the r k e light will illuminate to let you know that the command has been received and the vehicle's doors have been locked or unlocked accordingly.