Rear Wishbone Mercedes SLK R172 Upper Left N/S Control Arm Strut A1723500106

Rear Wishbone Mercedes SLK R172 Upper Left N/S Control Arm Strut is an original component from the Control arms and ball joints group, designed for the rear axle of this model. The design of the wishbone ensures precise wheel guidance, body stability, and predictable vehicle behavior during acceleration, braking, and cornering. It is a solid foundation for restoring the correct suspension geometry in your Mercedes.

Specifications and technical data

• SKU: A1723500106
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1723500106
• Substitutable numbers: A1723500106, A 172 350 01 06
• Location on the vehicle: Rear, Left
• Category: Control Arms, Ball Joints & Assemblies

Purpose and suspension placement

The presented upper wishbone operates in the rear part of the suspension, on the left side. It is responsible for maintaining the correct position of the hub relative to the body, controlling toe-in, and wheel alignment angles. A properly selected and functional component in this location limits unwanted lateral movement, improves stability at higher speeds, and reduces the risk of uneven tire wear.

Thanks to its factory geometry and fitment for the SLK R172 platform, the wishbone works in harmony with other rear suspension components, such as springs, shock absorbers, and other arms, creating a cohesive, predictable chassis system.

Technical characteristics and role in the chassis system

The rear axle upper wishbone in the Mercedes SLK R172 transfers vertical and lateral loads that occur when driving over bumps and during dynamic maneuvers. Its task is to:

• maintain the constant suspension geometry designed by the manufacturer,
• limit uncontrolled wheel displacement relative to the body,
• work with ball joints and bushings to dampen vibrations,
• ensure stable vehicle handling in curves and during lane changes.

A properly selected upper wishbone helps minimize suspension play, which translates into more confident handling, better response to steering inputs, and significantly higher driving precision.

Benefits of using an original Mercedes wishbone

Using an original component from the Control arms and ball joints group in the Mercedes SLK R172 allows you to maintain factory suspension performance parameters. Key advantages include:

• dimensional compatibility with the mounting point on the body and steering knuckle,
• predictable behavior under load, in accordance with the manufacturer's specifications,
• easier geometry adjustment after installation,
• consistent cooperation with stock shock absorbers and springs.

For the user, this means more confident handling, better vehicle control, and a reduction in unwanted noises resulting from excessive play in the rear suspension.

Selection, installation, and operational aspects

Before installation, it is recommended to verify the part's compatibility with the specific vehicle equipment version and to check the remaining rear suspension components. After replacing the upper wishbone, it is necessary to perform a wheel alignment to fully utilize its capabilities and ensure even tire wear. A properly selected and installed component limits excessive body roll, improves traction, and enhances ride comfort on uneven surfaces.

To better understand the role of this component in the entire chassis system and the relationships between wishbones, shock absorbers, and stabilizers, it is worth reading our guide: Suspension system – a comprehensive guide to shock absorbers, wishbones, and stabilizers. This provides practical knowledge when planning suspension service work.

Expansion and modernization of the Mercedes rear suspension

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

For renovation or modernization projects, especially for cars with model years similar to the SLK R172, an inspiring supplement may be the article on using used components to refresh older cars: The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 era. It allows you to better plan the scope of work and choose the right strategy for replacing suspension components.