Mercedes W163 Rear Bench Backrest Gas Strut Right O/S Side A1639800164

Mercedes W163 Rear Bench Backrest Gas Strut Right O/S Side is an original component designed for stable support and controlled movement of the rear bench backrest on the right side of the vehicle. Thanks to its precise operating characteristics, the gas strut ensures predictable folding and unfolding of the backrest, which improves the daily comfort of using the interior. This is a practical solution for drivers who want to maintain the factory functionality of the rear bench in their Mercedes and ensure its safe operation.

Specifications and technical data

• SKU: A1639800164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1639800164
• Substitutable numbers: A1639800164, A 163 980 01 64
• Location on the vehicle: Rear, Right
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function of the gas strut

The presented gas strut is dedicated to the rear bench in the Mercedes W163 model, where it is responsible for assisting the movement of the backrest on the right side. Its task is to control the speed and force of folding and unfolding, so that operating the backrest is smooth and predictable. A properly selected gas strut reduces the risk of the backrest falling suddenly, which is important for both user safety and the durability of the adjustment mechanism.

Its placement in the rear part of the vehicle on the right side means that this component works in the immediate vicinity of the bench folding mechanisms and upholstery mounts. The proper characteristics of the gas strut allow for maintaining factory settings and ergonomics of operation, which is particularly important when frequently using the split-bench function and expanding the luggage space.

Construction and fitment for Mercedes W163

The rear bench backrest gas strut has been designed with precise fitment to the interior construction of the Mercedes W163 in mind. This includes the appropriate working length, piston stroke, and mounting points that work with the factory brackets in the body and the backrest frame. As a result, installation is straightforward, without the need to interfere with the original upholstery or seat structure elements.

The gas-based solution ensures stable operating characteristics under typical vehicle usage conditions. The gas strut has been designed to carry loads resulting from the weight of the backrest and the dynamics of its movement, which translates into repeatable performance every time the bench is folded and unfolded. Maintaining the correct operating pressure is crucial for preserving user comfort and minimizing stress on the adjustment mechanism.

Vehicle placement and installation aspects

The component is intended for installation in the rear part of the vehicle on the right side, in accordance with the Rear, Right designation. Such placement requires maintaining the correct orientation of the gas strut relative to the mounting points to ensure the correct direction of force and the full range of backrest movement. Proper seating in the brackets minimizes lateral stress and affects the durability of the entire system.

When replacing, it is recommended to pay attention to:

• correct positioning of the gas strut relative to the backrest rotation axis,
• the condition of the sockets and mounts in the seat structure and the body,
• smoothness of the backrest movement after installation, without jamming or excessive play.

This approach allows for restoring the factory functionality of the rear bench and reducing wear on other components of the folding mechanism.

Performance characteristics and advantages of use

Using a dedicated gas strut in the Mercedes W163 rear bench translates into a number of practical benefits. Above all, it provides more controlled backrest movement, which facilitates daily use of the split-bench function and luggage space configuration. Stable support reduces the loads transferred to the hinges and locking elements, which can positively affect their durability.

Maintaining a functional gas strut is also important from a safety perspective – it limits the risk of uncontrolled backrest falling during folding, which is especially important in situations where passengers or cargo are nearby. For users who regularly modify the interior layout, a functional component of this type is an important element of vehicle operating comfort.

Condition, origin, and practical application

The offered gas strut is a used part from dismantling, which allows for an economical restoration of the full functionality of the rear bench in the Mercedes W163 while maintaining the character of the original equipment. For many users, this is a reasonable compromise between repair costs and maintaining compliance with the vehicle's factory design.

In practice, replacing a worn-out gas strut with a functional unit allows for restoring backrest operating comfort without the need to interfere with other seat components. This solution is particularly beneficial in vehicles used intensively, where the rear bench folding function is used often, and the stability and predictability of the mechanism have a direct impact on the convenience of use.

If you are planning a comprehensive repair or upgrade of the rear bench area in your Mercedes and need other components from the same group, such as adjustment mechanisms, backrest mounts, or additional mounting accessories, check the available parts in the Other Mercedes category.

For drivers interested in comparing the performance characteristics of sports drivetrains and suspensions with solutions used in everyday cars, a valuable addition to your knowledge may be an article describing the design differences in selected models – details can be found in the entry Audi RS vs other models – what is hidden under the hood and chassis?.