Dorman 520-980 Suspension Control Arm and Ball Joint Assembly - Front Right Lower Rearward

Overview of Dorman Suspension Control Arm 520-980

The Dorman 520-980 suspension control arm and ball joint assembly is designed for select Mercedes-Benz models, including the S55 AMG, S65 AMG, S350, S430, S500, and S600. Engineered with durable iron construction and rubber bushings, this control arm provides reliable suspension performance for light suspension grade applications.

• Control arm made from forged and cast iron for strength
• Includes rubber bushings for vibration dampening
• Machined ball joint mounting type with threaded stud (14 mm thread diameter)
• Mounting hardware included for straightforward installation
• Compatible with Mercedes-Benz S-Class models: S55 AMG, S65 AMG, S350, S430, S500, S600

Detailed Product Features and Specifications

The Dorman 520-980 control arm features a black finish and measures a maximum length of 237 mm and a maximum width of 288.5 mm. It is designed as a regular grade, light suspension component suitable for maintaining proper wheel alignment and suspension geometry. The assembly does not come pre-greased nor include a grease fitting, and it is not greaseable, which reduces maintenance requirements. The control arm includes one mounting hole with a diameter of 12.3 mm and comes with all necessary mounting hardware for installation. Note that the ball joint is not included or installed with this part.

Compatible Vehicles and Applications

This suspension control arm is compatible with a range of Mercedes-Benz S-Class vehicles, specifically the S55 AMG, S65 AMG, S350, S430, S500, and S600 models. It is designed to replace worn or damaged control arms in these vehicles, restoring suspension stability and handling performance.

Common Issues Addressed by This Control Arm

• Excessive suspension noise or clunking during driving
• Uneven tire wear caused by misaligned suspension geometry
• Loose or unstable steering response
• Vibration or shaking in the front suspension
• Worn or damaged bushings affecting ride quality

Installation Notes and Tips

Installation of the Dorman 520-980 control arm requires basic suspension knowledge and tools. Since the ball joint is not included or pre-installed, ensure compatibility with your existing ball joint or purchase separately if needed. The included mounting hardware simplifies the replacement process. Verify torque specifications for mounting bolts and perform a wheel alignment after installation to maintain proper suspension geometry.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit and function. This control arm is constructed from durable iron with rubber bushings to provide long-lasting performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their suspension parts to cover defects in materials and workmanship.