In pursuing a quote, make sure they understand that SL600 fronts are directionally vented. FWIW, my source for slotting/drilling rotors would not do my SL600 front rotors, as there's a reinforced section within each cooling vane that appears to be some sort of reinforecement, and is located precisely where you'd drill them.

Dean, if you want yours slotted, let me know 'cuz my source has already built a slotting program on his CNC machine specifically to do these rotors. I believe my cost was at/near $100 each (U.S.), including slotting.

__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo