Moog RK642798 Suspension Control Arm - Rear Lower Forward

Mercedes-Benz Rear Lower Forward Control Arm

Moog RK642798 is a stamped steel suspension control arm for rear lower forward applications on select Mercedes-Benz models. It is built with rubber bushings and a black corrosion-resistant finish to help restore stable rear suspension geometry on covered vehicles.

Key Features

• Stamped steel construction for structural strength
• Black finish for added corrosion protection
• Rubber bushings included
• Non-adjustable design
• No grease fitting and no ball joint included
• Direct replacement for rear lower forward suspension service

Fitment and Application

• Fits 2020 Mercedes-Benz GLA250, rear lower forward.
• Fits 2013-2019 Mercedes-Benz B250, rear lower forward. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 2014-2019 Mercedes-Benz CLA250, rear lower forward. Without Sport Package; Premium OE Replacement.
• Fits 2015-2019 Mercedes-Benz GLA250, rear lower forward. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 2016-2017 Mercedes-Benz B250e, rear lower forward. Suspension control arm and ball joint assembly meets OEM standards.
• Fits 2014-2015 Mercedes-Benz B Electric Drive, rear lower forward. Suspension control arm and ball joint assembly meets OEM standards.

Detailed Description

Moog RK642798 is engineered for foreign and domestic nameplates with an emphasis on structural strength and corrosion protection. The stamped steel arm and rubber bushings are selected to support rear suspension alignment and consistent ride behavior in the rear lower forward position. This part cross-references Mevotech Supreme CMS101361 for the same application.

For Mercedes-Benz GLA250, Mercedes-Benz CLA250, Mercedes-Benz B250, and related applications, RK642798 provides a direct-fit suspension control arm solution for rear lower forward replacement service. The part number RK642798 is also referenced by interchange numbers 520371 and CA28735.

Common Repair Symptoms

• Rear suspension clunking or knocking over bumps
• Excessive rear wheel movement from worn bushings
• Uneven rear tire wear caused by suspension looseness
• Imprecise rear suspension response during braking or cornering
• Visible cracking or deterioration in the control arm bushings

Installation Notes and Quality Assurance

Install in the rear lower forward position only on the listed Mercedes-Benz applications. Because this control arm does not include a ball joint or grease fitting, verify the surrounding suspension components before installation and confirm the vehicle is not equipped with the excluded Sport Package where noted. Moog RK642798 is backed by Moog’s OE-style engineering focus on strength and corrosion protection for replacement suspension parts.