Irregular and premature tire wear can be caused by the front thrust link bushings cracking and causing excessive movement in the suspension. The thrust link bushings are fluid-filled (to help reduce vibration), so if they crack, they will leak oil.Google+
Car Problem Reports
Mercedes-Benz CLS500 Tire Wear Caused By Worn Front Thrust Link Bushings
Mercedes-Benz CLS500 Problem
Model Year Affected: 2006
Average Mileage: 66,500 mi (61,000 mi - 72,000 mi)
Visitor, 2006 Mercedes-Benz CLS500, 61,000 mi
We have a 2006 CLS 500 with clunking and popping noise in the front end (and under my feet). After 4 attempts to replicate the "noise", we left the car at the dealership for 4 days. There was a "cracked spring/pulling link arm bushing replaced. along with both front spring link bushings cracked." The RF strut had an internal seal failure with the RF strut leaking oil. It was replaced as well. Finally, after several attempts, we picked up the car today. It seems to have fixed the problem. Funny, though, the dealership says, "this condition was found to be present in both the same model and other models. This is NOT ABNORMAL, and no further action is needed." How do you like that? A $71,000. car that never, ever had this problem. Now at 60K, this is "NOT ABNORMAL". So hopefully, this time, it is fixed. We hope we helped you as well.
hearing this noise coming from my front wheels, took my car in to a Mercedes dealership and was told it's a common problem seen in cls 500. I was told my tires are worn un-evenly and I may need new tires. I still belive my problem has to do with the struts. Not fixed yet.