Mercedes W639 Spring Strut Sachs Rear Left Right Shock Absorber Set 317 338

Mercedes W639 Spring Strut Sachs Rear Left Right Shock Absorber Set is a suspension strut set designed for the left and right side of the rear axle. These components ensure suspension control, body stabilization, and predictable vehicle handling when driving under load and during emergency maneuvers.

Specifications and technical data

• SKU: 317 338
• Mark: Unbranded
• Condition: Used
• OEM Part Number: 317 338
• Substitutable numbers: 317 338, 317338
• Location on the vehicle: Rear, Right, Left
• Category: Shocks, Struts & Assemblies

Purpose and vehicle placement

The presented rear shock absorber set is intended for installation on the rear axle, on both the left and right sides. This solution allows for the simultaneous replacement of both components, which promotes uniform suspension performance and reduces damping differences between the sides of the vehicle.

Placement on the rear axle is crucial for stability during braking, towing a trailer, and carrying cargo. Functional shock absorbers reduce body roll, improve tire contact with the road surface, and support the operation of safety systems such as ABS or ESP.

Technical characteristics of the shock absorber set

The set belongs to the Shock absorbers and struts group, meaning it is responsible for damping suspension spring movements and controlling wheel travel relative to the body. The Sachs strut design is engineered for predictable damping characteristics, matched to the weight and purpose of Mercedes commercial and passenger-commercial vehicles.

Shock absorbers of this type operate in a compression and rebound cycle, reducing vibrations caused by road irregularities. As a result, they:

• reduce body roll in corners,
• stabilize the vehicle during sudden maneuvers,
• support even tire wear,
• improve ride comfort on uneven surfaces.

The brand specified as unbranded means that the item is not signed with the vehicle manufacturer's logo, but remains functionally matched for use in the given model.

Condition of components and service application

The offered shock absorber set is in used condition, making it a solution for users looking for an economical alternative for suspension repair. Such parts can be used, among others, for:

• replacing a damaged or leaking shock absorber after a collision or failure,
• restoring proper suspension operation after detecting excessive body roll or bottoming out,
• periodic maintenance when existing components show clear signs of wear.

Replacing shock absorbers on the rear axle as a set helps maintain consistent damping characteristics, which translates into predictable vehicle handling and better control over the car in daily operation.

Selection, compatibility, and technical support

When selecting shock absorbers for a specific Mercedes W639 version, it is recommended to verify compatibility with the part number and the vehicle's suspension configuration. The product has assigned interchangeable numbers, which facilitates comparison with factory-fitted components or other references used in service centers.

To deepen your knowledge on the diagnostics and operation of suspension components, it is worth using the advice contained in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, where practical aspects of assessing the condition of shock absorbers and the impact of their wear on driving safety are discussed.

Expanding repairs within shock absorbers and struts

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 suspension struts, mounts, or covers, check the available parts in the Unbranded Shock absorbers and struts category.

This allows you to plan a consistent service of the entire system, covering both shock absorbers and other cooperating components, which promotes the durability of the repair and stable vehicle handling parameters in the long term.