Click on the D.I.Y. tab at the top of the page and scroll down to the last article. This gives you a step by step description of changing pads and sensors (although it doesn't go into determining if you need to replace rotors or not).
2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg
And remember folks, Only You Can Prevent Hilliary.