Ok, I was able to figure out how to replace the knob... it is very similar to this publication: http://www.benzworld.org/publications/pub.asp?id=150 but instead of unclipping the leather boot around the gear shift you unclip the piece that includes the leather, the c/s button, and the park,reverse,neutral,and drive indicator and pull the whole thing up over the shifter knob and then the rest is the same.