After Installing New pads.... (pls see this horrible pic)
 

After installing front brake pads, i started to hear a sort of a soft grinding noise. Any ideas what may be wrong. The car stops fine, but just kinda annoying. Thanks in advance. Below is a horrible S500 accident looks like it wrapped around a lamp post. P.s. Thats the Rear of the car.

You have to make sure that one of the brake pads didn't get in facing the wrong way. I have seen it before.
Also, if there is a ridge on the rotors, the sensor wires can cause this noise.