1982 mercedes 300sd-rumble in front end-like every revolution of front wheels-turn right sharply or touch brake pedal and it quits-have put new idler arm kit, both new front wheel bearings, both new rotors, rotated tires around, new right front caliper- took to MBZ shop and they could not find noises-have looked and not found any excess wear in front end--Vielen Danke