that is due to your wifes car being a clean diesel probably 2007 and newer which is mandated by the government to run on low sulfur. but older diesels are designed to use higher sulfur contents and these diesels use the sulfur content to lube the high pressure fuel systems...
been there seen that. all of what you are seeing is lack of pad movement do to them get stuck in the caliper bridge's. im an A.S.E certified master tech. i have pretty much seen it all in my 15 years. factory does not lube their pad contact areas in the bridges and ppl just drive them like they...
yea like lateral run out, center hole diameter, and you should always mic a rotor in 4 different places. but if you have any pitting of the rotor dont even bother trying to machine them. plus machining is an dying practice with rotors being so cheap nowadays it cost the same to replacing them vs...