Took a long drive from LA to OC last night and had the windows down on the freeway for awhile. I noticed an intermittent "chirp" coming from both sides of the car. I say that because I could hear the sound bouncing off the guardrail or a car on my right side. Sound stops when I push on the brake, does not always occur when running normally. The sound is not the constant brake sensor sound of a worn pad. Not 'screeeeee'; 'chirp-chirp-chirp-chirp-chirp'

This leads me to believe that my recently purchased C280 may have been in a front end accident before I got it.

Other possibly related symptoms:
1. The car shimmies when braking from high speeds.
2. The right front wheel well guard is not attached/not attached correctly to the front bottom of the well and I'm getting some tire rub in left turns.

Might this have anything to do with the control arm bushing?

 

Maybe you should do a carfax check, It might give you some idea of what diriction to look. The fact that it looks worked on might mean it was in an accident and not properly put together. Sometimes there are members that get the reports for free.

 

I had the problem posted on a few other forums and some people came back and told me they were having a similar issue. So the car's going into the shop for a diagnosis.