Mercedes W221 Wishbone Upper Control Arm Rear Right O/S A2213520005

Mercedes W221 Wishbone Upper Control Arm Rear Right O/S is a precision component from the Control arms and ball joints group, designed for operation in the rear, right section of the suspension. This used original component ensures proper axle geometry, stable vehicle handling, and predictable body behavior during acceleration, braking, and cornering.

Specifications and technical data

• SKU: A2213520005
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2213520005
• Substitutable numbers: A2213520005, A 221 352 00 05
• Location on the vehicle: Rear, Right
• Part type: Control Arm & Ball Joint Assembly
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension

The rear right upper control arm in the Mercedes W221 model is responsible for the precise guidance of the wheel in the vertical and horizontal planes, as well as for maintaining correct toe and camber. Its placement in the rear zone, on the right side, means that this component operates in the immediate vicinity of the hub, shock absorber, and other multi-link suspension components. Thanks to the appropriately selected arm geometry and the use of ball joints and metal-rubber bushings, the control arm limits unwanted wheel movement, reduces vibrations transmitted to the body, and supports even tire wear. A correctly selected and functional component in this location is crucial for driving stability, especially at higher speeds and during dynamic maneuvers.

Benefits of using an original control arm

The original rear right upper control arm for Mercedes has been designed specifically for the suspension characteristics of this model, which translates into:

• precise fitment to the mounting points on the body and steering knuckle,
• preservation of factory handling parameters and ride comfort,
• consistent cooperation with other suspension system elements,
• appropriate stiffness and resistance to operational loads. A used original component is a solution that allows for maintaining the proper suspension performance characteristics while optimizing repair costs. In many cases, this is a more favorable option than low-quality replacements, especially in structurally demanding premium-class models.

Vehicle placement and assembly aspects

The presented control arm is intended for installation in the rear part of the vehicle, on the right side. Such vehicle placement requires maintaining the correct sequence of disassembly and assembly of suspension elements and the use of appropriate tightening torques for the mounting bolts. After replacement, it is recommended to perform a rear axle wheel alignment to fully utilize the potential of the newly installed control arm and ensure even tire wear. The rear right upper control arm works with other suspension arms, the spring, the shock absorber, and the stabilizer, so its condition has a direct impact on handling precision and ride comfort. Replacing a worn element with a functional component helps reduce knocking, play, and unstable behavior of the rear axle when driving over bumps.

Application in service practice

Replacing the rear right upper control arm is particularly recommended in situations where symptoms such as the following appear:

• noticeable play in the rear axle suspension,
• uneven tire wear on one side,
• knocking and metallic noises when driving over bumps,
• problems with setting wheel alignment within permissible values. Selecting the right element for a specific vehicle is facilitated by the presence of a dedicated part number and interchangeable numbers, which can be verified against service documentation or the existing component. This minimizes the risk of selecting the wrong control arm and potential assembly problems.

Expanding knowledge about suspension and related components

If you want to better understand how the suspension in your car works, what role control arms, shock absorbers, and stabilizers play, and how to recognize the symptoms of their wear, it is worth reaching for specialized materials. You can find practical information in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses the operation and diagnostics of key suspension elements in popular models. If you are planning a comprehensive repair or modernization of the suspension zone in your Mercedes and need other elements from the same group, such as additional arms, ball joints, or related guiding components, check the available parts in the Mercedes control arms and ball joints category.