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.
Car Problem Reports
Mercedes-Benz C320 Tire Wear Caused By Worn Front Thrust Link Bushings
Mercedes-Benz C320 Problem
Average Mileage: 130,000 mi (115,000 mi - 150,000 mi)
Visitor, 2002 Mercedes-Benz C320, 150,000 mi
Thrust arm bushings control arm bushijgs swaybar endlinks struts and shocks
Visitor, 2004 Mercedes-Benz C320, 115,000 mi
On slight turns the wheel will vibrate depending on the side of the bad ball joints or bushings. The vibration will get worse if the thrust arms or control arms are not replaced.