additude

So, this morning I go out to clean up the RX and it's all out of electricity. Battery is dead. My wife left the switich for the headlights in the "On" position when she got home last night. Not in auto, but I thought the headlights were supposed to turn off automatically if the keys were out of the ignition and the doors were locked.

Am I wrong or do I have a problem with the headlights not turning off automatically? They turn off in the LS when you pull the key out of the ignition. Shouldn't the RX do that also?

Thanks.