Irregular and premature tire wear can be caused by the lower control arm bushings cracking, resulting excessive movement at the control arm pivot point. Ball joints can also wear out prematurely, causing similar tire wear symptoms. I some cases it may be necessary to replace the lower control arm, including bushings & ball joint to correct this concern.
Car Problem Reports
Mercedes-Benz C230 Premature Tire Wear Due to Cracked Lower Control Arm Bushings
Mercedes-Benz C230 Problem
Average Mileage: 157,500 mi (155,000 mi - 160,000 mi)