So... I am tring to fix a ginding issue on my 2.6 and I am suspecting the rotors. I went on a search and decided the 400e upgrade is what I would like to do since i need to replace the parts anyway. I found a guy that is willing to sell me a set of caliper, rotors, and, dust sheilds off a s420 for $100 used. I need to know if these will work I have done a lot of sercahing today but have been unable to find the answer. Sorry if this has been coverd abefore and i couldnt find it but this is a DD and i need to get it going. Any help would be greatly appreciated.