Clicking sound from front suspension while braking

I've been getting a click/clank type of sound from my 300E front end or front brakes, not sure. To make it happen I would drive forward then brake. Now go in reverse and brake. This will make the sound. I applied the MB brake grease when installing the pads and greased sliding pins, but pins were kinda worn. Seems like the slider/pins could cause this noise a small amount of for/aft movement.? The rotors and bearings are new and properly adjusted as well.
Does this sound like it might be the control arm bushings?

I used to apply that red stop squeal stuff for back of brake pads but changed to the MB brake paste when I did brakes last. Anybody use any other product on back and sides of pads?

I am going to pull the calipers this weekend and put some more white lithium grease on the caliper mounting slider/pins. Maybe it will help.

A.