If you look at the bumper insert on the left hand side (the car's rhs), what is the oval insert? and why isn't there one on the other side? Doesn't look like a parktronic sensor as there are usually a clutch of those along the bumper length. Could it be the location of the DISTRONIC autonomous intelligent cruise control. Although if you read the report above, it quotes... "Signals are received from a radar sensor in the radiator grille."
Paul, are you going to buy the E220 off her?
You should think about it, it's a smashing car, personally I think it is a better car than the CLK convertible
Vivienne