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.
Premature Tire Wear Due to Cracked Lower Control Arm Bushings on Mercedes-Benz CLK430
Average mileage: 68,500 (10,000–180,000)
10 people reported this problem
2001 Mercedes-Benz CLK430 180,000 mi, Visitor
Inner tread wear on front tires.
2000 Mercedes-Benz CLK430 24,000 mi, Visitor
Premature tire wear. Need new tires every 12,000 miles
2002 Mercedes-Benz CLK430 60,000 mi, Visitor
For some reason, I have to replace the front lower control arm bushings about every year as they crack/break and these are dealer parts.Not sure about the quality of CLK's these days.