Mercedes SLK R172 Roadster Side Window Rear Left Strut Support A1726390143

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes SLK R172 Roadster Side Window Rear Left Strut Support is a specialized body component responsible for the stable guidance of the side window in the rear left section of the vehicle. Thanks to its precise fit to the SLK R172 roadster structure, it ensures secure support for the glass pane and proper operation of the window lifting and lowering mechanism. This solution is dedicated to users who expect solid body geometry and correct window operation in daily use.

Specifications and technical data

• SKU: A1726390143
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1726390143
• Substitutable numbers: A1726390143, A 172 639 01 43
• Location on the vehicle: Rear, Left
• Category: Mounts, Brackets & Hardware

Purpose and function of the component

The rear left side window strut support in the SLK R172 model operates in the rear zone of the body, where it is responsible for maintaining the correct position of the window relative to the door frame and seals. A properly selected component:

• stabilizes the window during high-speed driving,
• reduces unwanted vibrations of the glass pane,
• supports the tightness of the window-seal system,
• ensures proper cooperation with the lifting and lowering mechanism.

For a roadster, where side windows are an essential element of rigidity and acoustic comfort, a functional strut support has a direct impact on the perceived ride quality.

Fitment for Mercedes SLK R172

The component in question has been designed with the body structure of the Mercedes SLK R172 generation in mind, taking into account the specific geometry of the rear left part of the vehicle. The appropriate shaping of the mounts and guides allows for:

• retaining factory mounting points,
• proper fitment with the side window and adjacent elements,
• maintaining the body line intended by the manufacturer.

Such fitment facilitates installation without the need for interference with the vehicle's structure and allows for restoring factory window operating parameters after a collision, wear, or previous improper repairs.

Installation characteristics

The support belongs to the Brackets, mounts, and mounting parts group, which means its main role is to transfer loads and maintain the correct position of the window relative to the body. Its location in the rear left part of the vehicle requires precise adjustment during installation to:

• ensure uniform window guidance throughout the entire range of motion,
• avoid excessive stress on the glass and the lifting mechanism,
• minimize the risk of leaks and rattles when closing the door.

When replacing, it is recommended to check the condition of adjacent mounts and adjust the window position according to the service procedure, which will allow you to fully utilize the potential of the newly installed support.

Condition and use in repair projects

The element comes from a used vehicle, which makes it an attractive choice for budget repairs or body reconstruction after damage. A properly selected used strut support allows you to:

• reduce the cost of restoring the functionality of the rear side window,
• maintain compliance with the factory Mercedes construction,
• maintain consistency in the operation of the window mechanism after replacement.

For workshops specializing in the Mercedes brand and for users servicing their cars themselves, this is a practical service solution, especially during repairs after side collisions or problems with window guidance.

Repair expansion and knowledge about used parts

If you are planning a comprehensive repair or modernization of the side window mounting zone in your Mercedes and need other elements from the same group, such as additional brackets, guides, or mounts, check the available parts in the Mercedes Brackets, mounts, and mounting parts category.

When selecting parts from the secondary market, it is worth knowing the typical pitfalls associated with purchasing dismantled parts, which is why an article describing the most common mistakes when assembling components for modifications and repairs may be helpful. You can find more practical tips in the material: Buying used car parts • Most common mistakes when choosing parts for tuning.