Mercedes Vito W639 Spring Strut Sachs Rear Left Right Shock Absorber Set 311 645

Mercedes Vito W639 Spring Strut Sachs Rear Left Right Shock Absorber Set are robust, used components from the Shock absorbers and struts category, designed for operation on the vehicle's rear axle. They provide stable vibration damping, improving vehicle control when driving under load and on uneven surfaces. This is a practical solution for users looking for proven suspension components at a reasonable price.

Specifications and technical data

• SKU: 311 645
• Mark: Unbranded
• Condition: Used
• OEM Part Number: 311 645
• Substitutable numbers: 311 645, 311645, BG
• Location on the vehicle: Rear, Right, Left
• Category: Shocks, Struts & Assemblies

Purpose and vehicle placement

The presented rear shock absorbers are adapted for installation on the right and left side of the rear axle, which allows for consistent replacement of both elements in a single service step. Such a solution promotes uniform suspension operation, reduces body roll, and improves the predictability of vehicle behavior in corners and during braking.

Technical and functional characteristics

The rear shock absorbers from the Mercedes Vito W639 Spring Strut Sachs Rear Left Right Shock Absorber Set are designed as components responsible for the controlled damping of suspension spring movements. Thanks to their appropriately selected operating characteristics:

• they stabilize the body when driving over bumps,
• they reduce swaying during sudden maneuvers,
• they support the effectiveness of the braking system through better tire-to-road contact,
• they increase driving comfort during daily vehicle use.

The used construction ensures the preservation of factory mounting geometry, which facilitates installation in place of worn-out elements without the need for modifications. This is particularly important when servicing intensively operated vehicles, where repeatability and predictability of operation are key.

Brand, condition, and service application

The product is offered as an Unbranded brand item, which allows for economical replacement while maintaining the functionality required for daily operation. The used condition of the part makes it a cost-effective solution, especially for fleet or heavily used vehicles, where the priority is to quickly restore suspension efficiency.

Rear shock absorbers of this type work well for:

• post-accident repairs in the rear axle area,
• maintenance service after detecting excessive body roll or suspension bottoming,
• restoring handling stability after replacing other chassis system components.

Benefits of installation and practical aspects

The use of these rear shock absorbers allows for an improvement in the overall stability of the vehicle, which translates into more predictable car behavior in daily traffic. Better vibration damping helps protect other suspension components and reduces the loads transferred to the body. This is a practical choice for drivers who expect a clear improvement in comfort and control without investing in new, more expensive components.

Replacing rear shock absorbers in pairs allows for maintaining consistency in suspension operating characteristics, which is particularly important during dynamic driving, transporting loads, or frequent use of roads with poorer surface quality.

Suspension service expansion and educational materials

If you are planning a comprehensive repair or upgrade of the suspension area in your Mercedes and need other elements from the same group, such as additional shock absorbers, complete struts, or mounting brackets, check out the available parts in the Unbranded shock absorbers and struts category.

To better plan service work and understand the relationships between shock absorbers, control arms, and stabilizers, it is worth using our guide materials – you can find practical tips regarding diagnostics and operation in the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers.