Dorman 526-283 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

OE-Style Front Left Upper Control Arm

Dorman 526-283 is a direct replacement suspension control arm and ball joint assembly for specific Mercedes-Benz applications. It is built for the front left upper position and engineered to help restore smooth ride quality, directional stability, and predictable steering response.

Compatible With Mercedes-Benz S-Class models including S400, S500, S550, S600, S450, S560, and Maybach S550/S600/S650 applications listed below.

Key Features

• Direct replacement for the original equipment front left upper control arm assembly
• Pre-greased and ready for service
• Ball joint included and installed
• Rubber bushings included for OE-style suspension isolation
• Aluminum control arm construction with casting/forged design
• Machined ball joint mounting with pinch-style stud
• Standard replacement grade for factory-style fit and function
• No grease fitting and no mounting hardware included

Detailed Description

This Dorman suspension control arm and ball joint assembly, part number 526-283, is made for the front left upper suspension position on select Mercedes-Benz S-Class vehicles. The aluminum casting/forged construction, machined ball joint mounting, and pre-installed ball joint help simplify replacement while maintaining OE-style geometry. The assembly is pre-greased, uses rubber bushings, and is built as a standard replacement for worn or damaged original components. This part cross-references MOOG Chassis Products RK623921 for the same application.

What It Helps Address

• Front-end clunking or looseness from worn control arm bushings
• Excessive play caused by a worn upper ball joint
• Uneven tire wear related to suspension geometry issues
• Steering wander or reduced directional stability
• Ride quality changes from fatigued suspension components

Installation Notes and Fitment

Fits 2018-2021 Mercedes-Benz S560, front left upper. Fits 2018-2020 Mercedes-Benz Maybach S560, front left upper. Fits 2018-2020 Mercedes-Benz Maybach S650, front left upper. Fits 2018-2020 Mercedes-Benz S450, front left upper. Fits 2019-2020 Mercedes-Benz S450L, front left upper. Fits 2019-2020 Mercedes-Benz S560e, front left upper. Fits 2019-2020 Mercedes-Benz S560L, front left upper. Fits 2016-2020 Mercedes-Benz S600L, front left upper. Fits 2016-2018 Mercedes-Benz S400L, front left upper. Fits 2014-2018 Mercedes-Benz S500, front left upper. Fits 2017-2018 Mercedes-Benz S500L, front left upper. Fits 2015 Mercedes-Benz S500L, front left upper. Fits 2017 Mercedes-Benz Maybach S550, front left upper. Fits 2016-2017 Mercedes-Benz Maybach S600, front left upper. Fits 2014-2017 Mercedes-Benz S550, front left upper. Fits 2015-2017 Mercedes-Benz S550e, front left upper. Fits 2015-2017 Mercedes-Benz S600, front left upper. Fits 2014-2015 Mercedes-Benz S400, front left upper.

Verify suspension orientation and part match before installation. Because mounting hardware is not included, reuse or source the correct hardware as required by the vehicle application. Professional alignment is recommended after replacement.

Quality Assurance

Dorman evaluates this control arm and ball joint assembly through an industry-focused validation process to support proper ride control, stability, and predictable handling characteristics. Part number 526-283 is built as a direct OE-style replacement for the listed Mercedes-Benz S-Class applications.