Dorman 521-504 Suspension Control Arm - Rear Right Upper Forward

Durable Aluminum Suspension Control Arm for Mercedes-Benz

The Dorman 521-504 suspension control arm is engineered to provide reliable performance for various Mercedes-Benz models. Designed with a coated aluminum construction and rubber bushings, this control arm offers a balance of strength and flexibility to maintain proper suspension alignment and vehicle handling.

• Constructed from durable aluminum with a coated finish for corrosion resistance
• Includes one black rubber bushing with a 14.3 mm inside diameter and 39.6 mm outside diameter
• Overall length of 262.5 mm for precise fitment
• Welded ball joint mounting type with threaded ball joint stud (ball joint not included)
• Compatible with multiple Mercedes-Benz models including CLS55 AMG, CLS63 AMG, E63 AMG, SL500, and more

Product Features and Specifications

This suspension control arm features a casting and forged aluminum construction that ensures structural integrity while reducing weight. The black coated finish helps protect against rust and environmental damage. It comes equipped with a single rubber bushing designed to absorb vibrations and reduce noise, improving ride quality. The ball joint mounting is welded, and the ball joint stud is threaded, allowing for secure attachment (note that the ball joint itself is not included). The control arm measures 262.5 mm in length, matching OEM specifications for a proper fit.

Compatible Mercedes-Benz Models

This Dorman suspension control arm 521-504 is compatible with a range of Mercedes-Benz vehicles, including:

• CLS55 AMG, CLS63 AMG, CLS350, CLS500, CLS550
• E63 AMG, E320, E350, E500, E550
• SL500, SL550

Common Applications and Problem Resolution

• Replaces worn or damaged suspension control arms to restore proper wheel alignment
• Eliminates excessive suspension noise caused by deteriorated bushings
• Improves vehicle handling and stability by maintaining correct suspension geometry
• Addresses uneven tire wear resulting from faulty control arm components
• Restores suspension performance after collision or impact damage

Installation Notes and Tips

Installation of the Dorman 521-504 control arm requires removal of the old control arm and proper alignment of the new part. Since mounting hardware and ball joint are not included, reuse existing components or purchase replacements separately. Ensure all bolts are torqued to manufacturer specifications. It is recommended to perform a wheel alignment after installation to maintain optimal handling and tire wear.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit and function. The 521-504 control arm undergoes rigorous quality checks to ensure durability and performance. While specific warranty details are not provided, Dorman typically offers limited warranties on their suspension parts to cover defects in materials and workmanship.