Thanks for all your replies.

To KESTAS: I replaced the pads & rotors last summer and did apply that anti-squeal stuff. Pads & rotors were all MB.

To RALPH: I will look into the vacuum brake boost as a problem. Took the car to my indy and was able to replicate the problem for him. Now he knows what it sounds like and doubts its the bearings. Should I have him repack the grease in the bearings since he'll be working in that area anyway?

When I drove the car to the indy to try and replicate the sound. I can confirm that the sound only occurs when the car is driven at slow speeds stopping / braking frequently like in a traffic jam. If the car is driven at hwy speeds (above 40 mph) and I brake hard, it stops smoothly and sounds normal (ABS also comes on normally). Sound only occurs in slow traffic / frequent braking conditions.

I hope to have this resolved soon and will post an update.

__________________
ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)