I have a 2003 Mercedes Wagon C320 AWD with 112,000 miles on it. Bought it second hand and shortly thereafter began hearing a grinding/thumpming noise IN THE REAR of the auto when I turn either way, and, when I release the break pedal after starting from a standing position.
I do not hear the sound when I am driving straight or when I am breaking. The noise gets louder as the turn I make is sharper. I have had new break pads, new right front spings, and a new RF Axle installed at a considerable cost. However, the noise continues.
Repair shops seem not to be able to pinpoint the problem. Can you give me some ideas of what needs to be repaired.