The lower control arm bushings can wear and crack, resulting excessive movement at the control arm pivot point, leading to irregular and premature tire wear. Worn Ball joints can also cause 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 E420
Average mileage: 100,000 (100,000–100,000)
4 people reported this problem
Bushings replaced at roughly 100K; repair did not last as long as expected. Complete lower control arms installed at 173K miles, together with left rear suspension link and bushings.