A rattling in the front end started occurring at about 30,000 miles. On very smooth roads you don't hear it. On a gravel driveway, especially a heavy stone, the front end, both left and right sounds like it is going to come apart. Many owners of the 300 Chrysler have complained on forums with no fix to it. Many have invested is high repair bills from the dealers to replace struts, ball joints, sway bar links, bushings and still have the noise. Both I and my mechanic cannot see anything obvious. We cannot duplicate the noise while up on a lift or blocks.