[quote=Damage Control]Turn the passenger side airbag on/off by inserting the key in the side of the dash when the passenger door is open. Not quite hidden, but I'm sure there are people here that don't know about it.

After turning the key to "off" you can turn the radio on and remove the key completely.[/quote]
Ambiguous statement that may cost a life.
This last statement in red does not apply to the air bag key slot. Of course you all knew that. LOL

You can turn the radio on without the key in at all.
It times out after 30 minutes (?) or when the battery gets a bit too low.