Good evening after further inspecting my rear tires today I noticed that my inner thread of my rear tires are almost gone out My question concerning this because when I check my front tires the thread of the inner and the outer tire thread is completely like new.

my car is 2008 Mercedes’ c300 rear wheel drive

 

Your car is a W204, not a W203.

With that said, is the suspension modified in any way? These cars will often develop negative camber when lowered.

Has the car been in a collision?

 

All Mercedes have factory camber and this is normal especially for the rears

 

That’s usually a sign alignment is off. My alignment has been off and no matter who did it they didn’t do a good job even at the dealer. I’m a tech so I now do it myself, and just put in camber kits to get me green again. Now I’m putting on new tires tomorrow and we’ll see…

I put the toe in the green before, this alignment was for camber correction