I own a 2007 E 350 with 17K miles on it....I was in my garage when I began hearing this very slight beep. My wife and I looked everywhere for it and could not find it. After backing the Mercedes out of the garage the sound went away. After pulling the car back into the garage the beep could be heard once again but could not pin point where it was coming from. Only after popping the hood was the sound slightly louder...but still could not ID where the little beeps are coming from.

ps I trust I am in the right forum this is my first visit here.