Moog RK621159 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Rearward

Mercedes-Benz Front Left Lower Rearward Control Arm

The Moog RK621159 is a front left lower rearward suspension control arm and ball joint assembly for select Mercedes-Benz applications. Built with forged steel construction, rubber bushings, and a pre-greased design, it supports precise suspension geometry and OE-style replacement needs for Mercedes-Benz C-Class and E-Class models.

Key Features

• Forged steel control arm for structural strength
• Pre-greased for ready-to-install service
• Rubber bushings included for suspension isolation
• Press-in ball joint with threaded stud type
• Mounting hardware included
• Black corrosion-resistant finish
• Moog RK621159 for front left lower rearward placement

Detailed Description

Moog RK621159 is engineered as a suspension control arm and ball joint assembly for the front left lower rearward position on select Mercedes-Benz vehicles. It is a direct-fit replacement for 2008-2014 Mercedes-Benz C300, 2008-2015 Mercedes-Benz C350, 2008-2009 Mercedes-Benz C230, 2010-2012 Mercedes-Benz C250, 2012-2014 Mercedes-Benz E350, and 2015-2017 Mercedes-Benz E400. This part cross-references Dorman OE Solutions 524-311 for the same application. The forged steel arm, press-in ball joint, and included rubber bushings are built to restore suspension alignment and steering response while helping resist wear in demanding road conditions.

Common Repair Applications

• Front-end clunking or looseness from a worn control arm
• Uneven tire wear caused by suspension geometry issues
• Steering wander or reduced directional stability
• Ball joint play in the front left lower rearward suspension point
• Cracked or deteriorated bushings on Mercedes-Benz C-Class or E-Class models

Installation Notes and Tips

Confirm the front left lower rearward position before installation. This assembly is not adjustable, so final alignment should be performed after replacement. The ball joint uses a press-in mounting type with a threaded stud, and the unit is pre-greased for service. Verify fitment against the vehicle year, model, and suspension configuration before installation. Moog RK621159 is also listed with interchange references including Mevotech Supreme CMS101337 and CMS101339.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection on foreign and domestic nameplates. RK621159 is built to OE-style standards for the specified Mercedes-Benz applications and uses durable materials selected for suspension service.