Mercedes R172 Control Arm Rear Suspension Upper Wishbone Left N/S A1723502203

Mercedes R172 Control Arm Rear Suspension Upper Wishbone Left N/S is a precision component from the Control arms and ball joints group, designed for operation in the rear, left part of the suspension. Engineered for Mercedes vehicles, it ensures stable handling, predictable wheel geometry, and safe load distribution during daily operation.

Specifications and technical data

• SKU: A1723502203
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1723502203
• Substitutable numbers: A1723502203, A 172 350 22 03
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and function in the suspension system

The presented upper control arm operates on the rear axle on the left side, responsible for maintaining proper suspension geometry and controlling the wheel position relative to the body. As a guiding component, it works with other suspension parts, stabilizing the vehicle's path during acceleration, braking, and traversing uneven surfaces.

Thanks to the precisely selected geometry of the arm and mounting points, the control arm helps reduce unwanted changes in wheel alignment and camber, which translates into more confident handling, even tire wear, and predictable vehicle behavior in corners.

Benefits of using an original Mercedes control arm

Using an original control arm on the rear axle of a Mercedes vehicle allows for maintaining factory suspension performance parameters. The component has been designed for the specific body and chassis construction, which facilitates installation and minimizes the risk of fitment issues.

Key advantages include:

• Stable vehicle handling due to maintaining proper wheel geometry.
• Better control over the car during dynamic maneuvers.
• Reduction of excessive play in the suspension, which can cause knocking and uncertain road behavior.
• Possibility of precise geometry adjustment after replacing the component.

Installation and operational characteristics

The control arm is intended for installation in the rear, left part of the suspension, at the upper wheel guidance point. The design provides for compatibility with factory mounting points in the body and steering knuckle, which facilitates service work and reduces replacement time.

After installation, it is recommended to perform a wheel alignment to fully utilize the potential of the new component and ensure even tire wear. A correctly selected and installed control arm affects ride comfort by reducing unwanted vibrations and improving vehicle stability at higher speeds.

Technical support and suspension knowledge

If you want to better understand the role of control arms in the chassis system and the relationships between shock absorbers, control arms, and stabilizers, it is worth checking out verified technical materials. Practical information can be found in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which discusses, among other things, the operation of control arms in Mercedes vehicles.

In case of diagnosing knocking, play, or reduced steering precision, a guide on economical suspension repair may also be helpful, describing the advantages of using dismantled parts and ways to improve ride comfort – check out the material Knocking in the suspension? Discover a clever way to restore factory handling precision without spending a fortune at the service center.

Expanding repairs within the same group

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