2002 Mercedes Benz C230 front end noise

The loud squeeking nosie you are hearing is more than likely worn thrust arm bushings. This is a very common problem for this vehicle. You can check this by looking under the vehicle. You will notice two large aluminum arms (thrust arms) going from the lower control arms at both front wheels to the front frame section of the car. You should notice cracking or leaking at the bushings located at the end of the thrust arms. These cracked bushings are the cause of the squeeking.