I am working on a 75 450SL. The left rear disc brake is pretty badly grooved on the inside of the disc. I was getting ready to order a new brake disc and brake pads. The "PartsShop" shows brake discs from ATE (Teves), Zimmerman Cross, and Balo. They show pads from PBR , Pagid, ATE,& Textar. Can anyone tell me if these are just different brands or how do I tell which kind I have on my car? The car only has 75,000 orginal miles on it and I was also wondering what normally causes the brake disc to get grooved, and just on one side the left side appears to be in very good shape. I imagine these are the orginal brakes, so is this common?
Thanks
Dug