thank you sixto. I did watch that video many times before I tried to take it off. I am not sure if there is any difference between an E430 w210 and an E320 w210. The video is for an E430.
I saw this link http://www.benzworld.org/forums/attachments/w210-e-class/137403d1186552982-instruction-bumper-removal-2000-later-model-front_bumper.pdf
The first picture on the second row, I am not sure where that lock is. That was the one that I did not do yesterday. Once I find it, I hope it is just a matter of using a screw driver and push it forward or backward.