Dorman 521-289 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Forward

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 521-289 suspension control arm and ball joint assembly is engineered for reliable performance in select Mercedes-Benz models. Designed with pre-greased components and included bushings, this assembly ensures smooth suspension operation and improved vehicle handling.

• Pre-greased for immediate use without additional lubrication
• Includes rubber and steel bushings for enhanced durability
• Machined ball joint with threaded stud for secure mounting
• Constructed from lightweight aluminum with a black finish
• Mounting hardware included for straightforward installation

Product Features and Specifications

This suspension control arm and ball joint assembly (part number 521-289) is crafted from forged and cast aluminum, providing a balance of strength and weight savings. The assembly comes pre-greased, eliminating the need for initial maintenance, and features a machined ball joint with a 14 mm threaded stud for precise fitment. Rubber and steel bushings are included to absorb road vibrations and reduce noise. The control arm measures up to 288.5 mm in width and 237 mm in length, with a single 12.3 mm mounting hole for secure attachment. The black finish offers corrosion resistance and a clean appearance.

Compatible Mercedes-Benz Models

This Dorman suspension control arm and ball joint assembly is compatible with a range of Mercedes-Benz vehicles, including the CL63 AMG, CL65 AMG, CL500, CL550, CL600, S63 AMG, S65 AMG, S400, S500, S550, and S600 models. It is designed to meet the suspension requirements of these vehicles, ensuring proper fit and function.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing poor handling
• Ball joint wear leading to steering instability
• Excessive suspension noise or vibration
• Corroded or weakened control arm structure
• Misalignment due to faulty suspension components

Installation Notes and Tips

Installation of the Dorman 521-289 assembly requires basic suspension knowledge and tools. Since the part comes pre-greased and includes mounting hardware, it simplifies the replacement process. Ensure the vehicle is securely lifted and supported before removing the old control arm. Verify torque specifications for mounting bolts and ball joint stud during installation. Alignment check after installation is recommended to maintain proper suspension geometry.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 521-289 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and performance. This product includes a limited warranty covering defects in materials and workmanship, providing confidence in its reliability for Mercedes-Benz suspension repairs.