This 2123302711 2123302811 control arm is a common wear item on higher mileage. It is responsible with "locating" the suspension and is an important component of your Mercedes benz‘s W212 car. As bushings and joints in a control arm begin to wear you may notice a looseness feel in your suspension. While many arms have replaceable and serviceable individual components, many still require the replacement of the entire arm. The inner bushing can be replaced,but in most cases ,if the inner bushing fails the outer ball joint has failed which will require replacement of the entire control arm.

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