Quote:
Originally Posted by nazab
What about the 300C 5.7 , which rotors and pads do you recommend as I am not happy with the OE. I have changed rotors and pads under waranty and still hear a braking noise ( hmmm ) under hard braking at 100 mph or more.
Also suffered from rotors wraping at only 15000 miles !
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It's normal to hear a low frequency hum from your brakes when braking hard from speeds in excess of 100mph. So I'm not sure a different pad choice is going to help you here.
The amount of heat you put into the brakes is proportional to the square of the velocity. For example, slowing the car from 120 to 104 (a 16mph reduction) puts as much heat into the rotors as coming to a complete stop from 60mph. So it's not much of a surprise that your brakes had some issues. You probably overheated your pads and they deposited material unevenly onto your rotors, resulting in judder. The rotors weren't really "warped". See this excellent white paper by the late Carroll Smith that goes into the detailed physics:
The "Warped" Brake Disc and Other Myths of the Braking System
If that low frequency noise during high-speed braking bothers you, then you might want to avoid slotted or drilled rotors. Personally I like it, since it reminds me of the sound of my brakes at the race track. And, of course, I prefer the extra bite of slotted rotors.