Hi, I have a 2001 c220 cdi saloon. Over the last couple of weeks it has been making a thudding noise in the back when going over bumps and today It felt as though the car was swaying slightly when going over 50mph.
Any ideas what this could be? Thanks in advance.

 

check the tire for bumps....maybe its a defective wornout tire that causing the swaying

 

check the rear coil springs, they usually break at the very bottom of the spring. also could be a bad shock.could be dangerous, get it checked out