Dorman 520-900 Suspension Control Arm - Rear Lower Forward

Overview of Dorman 520-900 Suspension Control Arm

The Dorman 520-900 suspension control arm is engineered for select Mercedes-Benz models, including the 300SD, 500SEL, and CL55 AMG. Crafted from durable aluminum with a coated silver finish, this control arm offers reliable performance and corrosion resistance for your vehicle's suspension system.

• Material: High-strength aluminum construction
• Coated silver finish for corrosion protection
• Includes rubber bushing with black color
• Length: 430 mm with overall length of 262.5 mm
• Ball joint mounting type: welded (ball joint not included)
• Press-in end type with bushing linkage end
• Compatible with multiple Mercedes-Benz models from 300SD to S600

Detailed Product Description

This suspension control arm by Dorman is designed with a casting and forged aluminum construction, providing a balance of strength and lightweight performance. The included rubber bushing, featuring a 14.3 mm inside diameter and 39.6 mm outside diameter, helps absorb road vibrations and maintain proper suspension alignment. The black bushing is pre-installed, ensuring a ready-to-install component. The control arm’s ball joint mounting is welded with a threaded stud type, though the ball joint itself is not included, allowing for customization or replacement as needed.

With a coated finish, the control arm resists corrosion and wear, extending the service life of your suspension system. The 430 mm length and 262.5 mm overall length dimensions are engineered to fit precisely on compatible Mercedes-Benz models, including the 300SE, 400SEL, and S500, among others.

Compatible Vehicles and Applications

• Mercedes-Benz 300SD, 300SE, 400SE, 400SEL
• Mercedes-Benz 500SEC, 500SEL, 600SEC, 600SEL
• Mercedes-Benz CL55 AMG, CL500, CL600
• Mercedes-Benz S55 AMG, S320, S350, S420, S430, S500, S600

This control arm is intended for suspension repair or replacement to restore proper vehicle handling and alignment.

Common Issues Addressed by This Control Arm

• Worn or damaged suspension bushings causing noise or vibration
• Misalignment leading to uneven tire wear
• Loose or failing control arm affecting steering stability
• Corrosion or structural fatigue in original control arm
• Replacement of bent or broken suspension components after impact

Installation Notes and Tips

Installation requires removal of the old control arm and proper torqueing of mounting bolts. Since the ball joint is not included, ensure compatibility with your existing ball joint or purchase separately. The press-in bushing end requires appropriate tools for removal and installation. It is recommended to have a professional alignment performed after installation to maintain optimal suspension geometry.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM specifications. The 520-900 control arm undergoes rigorous quality checks to ensure durability and fitment accuracy. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to Dorman’s official documentation for exact warranty terms.