Mercedes W639 Seat Box Front Left Right N/O/S Seat Mount Base Set A6396601740

Mercedes W639 Seat Box Front Left Right N/O/S Seat Mount Base Set is a precision-engineered structural component designed for the stable mounting of the seat in the front section of the vehicle. Thanks to its factory-fit design for the Mercedes W639 platform, it ensures consistency with the original body geometry and predictable performance during operation. This is a practical solution for users looking to restore proper seat mounting while maintaining the original installation characteristics.

Specifications and technical data

• SKU: A6396601840-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6396601840
• Substitutable numbers: A6396601740, A 639 660 17 40, A6396601840, A 639 660 18 40
• Location on the vehicle: Front, Left, Right
• Category: Centre & Overhead Console Parts

Purpose and function in the vehicle

The seat mount base is responsible for the stable connection between the seat and the floor in the front part of the cabin. This component operates in a critical area for safety – it transfers loads resulting from the weight of the occupant, forces acting during braking, and typical operational vibrations.

The solution is prepared for installation on either the left or right side in the front zone, which facilitates matching to specific interior configurations. The design of the box allows for maintaining the correct seat position relative to the steering wheel, pedals, and center console, which translates into ergonomics and driving comfort.

Construction and fitment for Mercedes W639

The component has been designed specifically for the Mercedes W639 body architecture, ensuring correct mounting points and compatibility with factory seat rails and frames. Properly shaped mounting surfaces facilitate the alignment of the box along the vehicle's axis and minimize the risk of stress during bolt tightening.

Its original origin from the Console Parts group means consistency with other structural interior elements – the center tunnel, seat bases, and adjacent components maintain factory fitment, which is essential for both post-accident repairs and the replacement of worn mounting components.

Practical application and installation

The seat mount base is primarily used for:

• repairs after collisions where seat mounting points have been damaged,
• interior restoration when the original mount shows signs of wear or deformation,
• swapping seats between equipment versions within the same vehicle generation.

Placement in the front of the vehicle on the left or right side allows for flexible use of the component depending on the seat configuration. When installed correctly, it provides stable seat support, which reduces unwanted play and improves the perceived rigidity of the entire seat system.

Product characteristics and benefits of choosing it

The offered seat mount base is a Mercedes brand part, which in practice means compliance with factory design and material standards. The nature of this component allows for an economical restoration of the mounting system's efficiency while maintaining the original design intended by the manufacturer.

For the user, this means:

• maintaining the factory seat position relative to other cockpit elements,
• consistency with existing mounting points in the vehicle floor,
• the ability to integrate with original seat rails and frames.

Expanding the mounting system and related components

If you are planning a comprehensive repair or upgrade of the center console and seat mounting area in your Mercedes and need other items from the same group, such as additional brackets, structural covers, or seat support components, check out the available parts in the Mercedes Console Parts category.

When planning work involving used components, it is also worth familiarizing yourself with the general principles of selecting and installing aftermarket parts – practical tips, examples of applications, and a discussion of compatibility issues can be found in the article Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?, which covers universal issues also useful in the context of other brands.