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.Google+
Car Problem Reports
Mercedes-Benz E430 Premature Tire Wear Due to Cracked Lower Control Arm Bushings
Mercedes-Benz E430 Problem
Average Mileage: 123,500 mi (101,000 mi - 146,000 mi)
Visitor, 1999 Mercedes-Benz E430, 146,000 mi
Ball Joint wears out from the inside out. Broken arm. Car garage kept for the first 100,000 miles. CAUSED BROKEN ARM ON CAR WHILE DRIVING. 3rd of 3 issues associated with front end tire steering system in 3 years. 1st broken spring, 2nd metal failure on same front end wheel from rust. BROKEN SPRING ALSO WHILE DRIVING.
Visitor, 1999 Mercedes-Benz E430, 101,000 mi
40K milage tires worn out in 19k miles.