ML 320 clicking coming from under car after braking
 

2002 - ML 320

About 10 minutes into a drive - after braking typically - I begin to hear a fairly loud clicking noise coming from under the car. The clicks speed up in relation to the speed of the car, and slow down in the same manner. It's not something you can hear until you roll the windows down - and hear the sound bounce off the car next to you, etc. It does not happen all the time - but typically 10 minutes or so into the drive - I begin to hear it when driving around town. comes from the passenger side of the car.

ANY THOUGHTS? THIS IS A PRETTY EMBARRASSING NOISE!!