rear noise on 2006 Mercedes-Benz C280 4MATIC

when I sit in the car or someone is sitting in the back seat the car is making a squicky noise. I have tried to see if this noise happends while I drive or go over bumps but I have not noticed anything. I took the car to the dealer and they told me that I need to change the rear heim joints at almost 600.00 dollars. I think they're trying to rip me off. what could this noise be coming from? It sound like the spring on an old mattress while jumping on it!....

Asked by for the 2006 Mercedes-Benz C280 4MATIC
1 answer
why would you go to a dealer? there are plenty of local MB
specialty shops---just ask other MB owners who is the best
and get a second opinion.