Mercedes W211 Wishbone Front Right O/S Control Arm Upper Rod Strut A2113300438

Mercedes W211 Wishbone Front Right O/S Control Arm Upper Rod Strut is an element from the Control arms and ball joints group, designed for operation in the front, upper right suspension mounting point. It is a precisely engineered chassis component responsible for stable wheel guidance, proper suspension geometry, and predictable vehicle behavior on the road.

Specifications and technical data

• SKU: A2113309007
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2113309007
• Substitutable numbers: A2113309007, A 211 330 90 07, A2113300438, A 211 330 04 38
• Location on the vehicle: Front, Right
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the Mercedes W211 suspension

The presented control arm is dedicated to the front axle on the right side, at the upper mounting point. Its task is to transfer loads between the body and the steering knuckle and to maintain the correct position of the wheel relative to the body during acceleration, braking, and driving over uneven surfaces. Thanks to the properly selected geometry of the control arm, the steering system maintains stability, and the tire keeps the best possible contact with the road surface.

Construction and technical characteristics

The front right upper control arm in the Mercedes W211 operates at a critical point of the multi-link suspension. The construction is based on a rigid metal beam integrated with a ball joint and metal-rubber bushings (depending on the specific version), which allows for a controlled range of motion while damping vibrations. This solution ensures:

• precise guidance of the steering knuckle in the vertical and horizontal planes,
• maintenance of specified camber and caster angles,
• reduction of unwanted play in the steering system.

The properly selected stiffness of the component influences the predictable reactions of the car during dynamic maneuvers, while simultaneously limiting the transmission of vibrations to the body, which improves driving comfort.

Benefits of replacing the front right upper control arm

Replacing a worn control arm with a functional unit in a Mercedes W211 allows for the restoration of proper suspension operation. The most important effects include:

• reduction of play in the suspension and improved steering precision,
• more stable vehicle behavior during braking and lane changes,
• more even tire wear due to maintaining correct geometry,
• reduction of knocking and unwanted noises from the front suspension area.

For the user, this means more confident handling, better control over the vehicle, and higher comfort in daily operation. In the case of a multi-link suspension, such as in the Mercedes W211, the condition of each individual control arm has a direct impact on the entire kinematics of the system.

Vehicle placement and assembly aspects

The element is intended for installation on the front axle on the right side, at the upper suspension point. Such placement requires precise installation while maintaining proper tightening torques and setting the geometry after the work is completed. After replacing the control arm, it is recommended to perform a professional wheel alignment and camber adjustment to fully utilize the potential of the newly installed component.

Condition and practical application

The offered control arm is a used part, which in practice means the possibility of an economical suspension repair while maintaining the original design and fitment for the specific model. For many Mercedes W211 users, this is a reasonable compromise between cost and functionality, especially in the case of comprehensive suspension system maintenance, where several control arms are often replaced simultaneously.

If you are planning a comprehensive repair or upgrade of the front suspension area in your Mercedes and need other elements from the same group, such as additional control arms, ball joints, or connecting elements, check the available parts in the Mercedes control arms and ball joints category.

To better understand the role of this component in the entire chassis system and to consciously plan suspension maintenance, it is worth checking our technical guide Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses, among other things, the operation of control arms in the Mercedes W211.

For drivers considering the use of original aftermarket parts, a practical guide to the used parts market may also be useful: The best used car parts – a guide to the most frequently chosen original parts, helping to consciously select components for popular car models.