I have a 94 s500 with about 155,000 miles. All of the brake pads were changed about 8K miles ago. Today while driving, braking power felt normal, but I could feel a click when the pedal was pressed down to say 80% of maximum distance. It was as if I could "Feel" the pads squeezing the rotors, and I could hear it also. If I have the car in park, the feeling of the click in my brake pedal does not exist, and I cannot "hear/feel" the calipers squeezing. The car has to be moving, low speed or high. I can hear it and feel it better at red lights just because of lower car noise, etc.....Do I need new rotors?