Dorman 521-297 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly for Mercedes-Benz

The Dorman 521-297 suspension control arm and ball joint assembly is engineered for reliable performance in Mercedes-Benz E320, E350, E500, and E550 models. Designed with quality materials and pre-greased components, this assembly ensures smooth suspension operation and improved vehicle handling.

• Pre-greased for immediate installation and reduced maintenance
• Includes rubber bushings and mounting hardware for a complete replacement
• Aluminum control arm with a black finish for corrosion resistance
• Press-in ball joint with threaded stud for secure mounting
• Compatible with Mercedes-Benz E320, E350, E500, and E550 models

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman features a casting/forged aluminum control arm measuring up to 288.5 mm in width and 237 mm in length. The assembly includes rubber bushings to absorb road vibrations and a pre-installed ball joint with a 14 mm threaded stud for a secure fit. The control arm is designed for light suspension grade use and comes with one mounting hole of 12.3 mm diameter. Mounting hardware is included to facilitate installation, although the assembly is not adjustable. The black finish provides added protection against corrosion and wear.

Compatible Vehicles and Applications

This Dorman 521-297 control arm and ball joint assembly is specifically compatible with the following Mercedes-Benz models:

• Mercedes-Benz E320
• Mercedes-Benz E350
• Mercedes-Benz E500
• Mercedes-Benz E550

It is designed to replace worn or damaged suspension components, restoring proper alignment and suspension function.

Common Suspension Issues Addressed

• Excessive suspension noise or clunking
• Uneven tire wear due to misalignment
• Loose or unstable steering feel
• Vibration or harshness over bumps
• Worn or damaged control arm bushings and ball joints

Installation Notes and Tips

Installation of the Dorman 521-297 assembly requires basic suspension knowledge and tools. Since the ball joint is press-in type with a threaded stud, ensure proper torque specifications are followed during mounting. The assembly comes pre-greased and includes bushings and mounting hardware, simplifying the replacement process. It is recommended to have a professional alignment performed after installation to maintain optimal handling and tire wear.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 521-297 control arm and ball joint assembly 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 materials and workmanship. Refer to the product documentation for exact warranty terms.