my car model is e-320 i bought it used but lately i been hearing strange noise in the front end whenever i hit a bump or potholes, i have it diagnosed in one of the mercedes-benz dealership and they found out the torque strut bushings leaking, is it where the noise is coming from ? they gave the est. but i think it is too expensive, how much do you think it will cost me to do the repair ? thanks...