How do you replace the front brake pads on 1998 Mercedes-Benz S500

I am trying to save $$ by doing some of the repairs myself to my 1998 S500 Mercedes.
I have been uable to get the pads out so they can be replaced.

Asked by for the 1998 Mercedes-Benz S500
There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate Read all the instructions carefully, also look on Youtube all sorts of repair videos there.
Thank you,