Volvo c70 D5 Sumum, sounds from rear or rear axle

For 3 years I’ve had a c70 d5 Su. Recently I have dull noises from the rear suspension left or rear. Volvo has replaced part of the damper suspension. After a short time the noise was back. Can someone help me who had similar problems. The noise sounds as if parts would hit each other or a rubber suspension was missing. Greeting Amy