Front thrust arm and control arm bushings can crack and sometimes tear completely. If this is not repaired quickly, damage to the front subframe unit will occur, which is very expensive to repair. Updated control arms (that prevent damage to the subframe when the bushings wear out) are available.
Front Thrust Arm and Control Arm Bushing Can Crack or Tear on Mercedes-Benz S430
Average mileage: 181,500 (81,000–288,000)
13 people reported this problem
2004 Mercedes-Benz S430 81,000 mi, Visitor
had to replace lower drivers side control arm due to busted ball joints $750
2001 Mercedes-Benz S430 180,000 mi, Visitor
bushing on both sides crack had to replace both of them [control arm budhing]was rubbing the frame making a squeaking noise did it my self parts are a lot cheaper on line
I have a loosening to the front thrust arm, passenger front tire. I just had my tires replaced and noticed vibration at high speeds.