cross-drilled rotors on newer cars???

[JHZR2]

Hi,

Im curious about the cross drilled rotors seen on the newest MBs, staring with the s-class and now the c class and maybe the e as well.

There is always a lot of discussion about cross drilled rotors, and lots of people are against them. Theyre an artifact from 1950s era racing when pads off gassed too much... They thermally crack easily... there's no point to using them, a solid rotor holds more heat and will provide better performance. Even new porsches and ferraris can devellop cracks, etc with use.

So then why does MB put them on? MB typically is REALLY good at testing and engineering stuff to provide the best longevity and service life. So why would they put these old technologies on their cars? I have heard that performance-wise, slotting is much better, and as far as Ive seen, F1 and other fast race cars use either solid or slotted discs nowadays.

Is there something that I'm missing? Im considering putting x-drilled zimmermans onto my 91 BMW, but have been really turned off; I think Im going with ATE powerdiscs in front and balo in the rear. But Im still curious how a technology that so many says is useless and can degrade performance can make its way onto more and more new MB cars.

Thanks,

JMH