hello all,im thinking of replacing my front pads soon,ive seen the standard mercedes pads,but ive also seen the ceramic compound one,whats the difference? besides the fact that ceramic cost more. are the ceramic like a semi ceramic compound? mixed in with the metallic material?,i know they use ceramic in racing applications,they can take high heat,whats the pros and cons of stock over ceramic,and if i choose ceramic do i need special rotors?thanks guys.