Hi there,
I would not worry about the egg thing. I had the same thing done to mine and I can only assume it was some dumb a$$ low IQ high school kids that get of on that kind of B.S.
Unfortunatly I was driving the 300D non turbo

and by the time I turned around and followed they were long gone. Bastards.
I doubt they knew I was driving a MBZ as the street was poorly lit.
Anyway, thanks for the chance to vent.
Mark.