Ok I have a 2006 SL. Intelligent Key and Navigaton. Exactly every 2 minutes the car beeps. It doesnt matter if the Radio is on or off, or if the engine is on or off. No Trouble lights on the dash illuminate. I took it to the dealer and they didnt know what it was, but comment I was the 2nd person with that complaint this week. The beeps sounds like the curtesy beep when you unlock the door. Someone send help!!!