Mercedes Vito W639 Seat Box Front Left N/S Seat Mount Base Bracket A6399100405

Mercedes Vito W639 Seat Box Front Left N/S Seat Mount Base Bracket is an original structural component designed for the installation of the driver or passenger seat on the left side. Thanks to its factory geometry and precise fit for the Vito W639 body, this seat box allows for a secure, stable, and safe seat mounting in the front part of the vehicle, maintaining the correct position and interior ergonomics.

Specifications and technical data

• SKU: A6399100405
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6399100405
• Substitutable numbers: A6399100405, A 639 910 04 05
• Location on the vehicle: Front, Left
• Category: Centre & Overhead Console Parts

Purpose and function in the vehicle

The described seat base is designed specifically for installation in the front left part of the Mercedes Vito W639 cabin. As a component from the Console Parts group, it is responsible for the rigid connection between the seat and the floor, as well as integration with surrounding center tunnel and console elements. A correctly selected seat box ensures:

• stable seat mounting along the vehicle axis,
• correct seat height and seating angle,
• maintenance of the factory position relative to the steering wheel and pedals,
• consistent fit with interior trim elements.

Construction and fit for Mercedes Vito W639

The front left seat base for the Vito W639 is a load-bearing structure adapted for operation in areas subject to high dynamic loads. Properly shaped mounting points allow for seat installation in accordance with the manufacturer's factory specifications, which facilitates maintaining the original interior geometry and correct driving position. The component is intended for installation in the front area of the vehicle, on the left side, which eliminates the risk of incorrect side selection or confusion with other structural variants.

Benefits of using an original seat base

Using an original seat base in a Mercedes Vito W639 helps avoid fitment issues that often arise with aftermarket replacements. The factory design ensures:

• compatibility with factory mounting points in the floor,
• proper load transfer from the seat to the body structure,
• easier seat installation and removal during service,
• maintenance of a consistent visual line and cabin ergonomics.

As a result, replacing a damaged or corroded base with an original component allows for restoring proper seat operating conditions and vehicle comfort.

Condition of the item and service application

The offered seat base is a used item, which in practice means it comes from disassembly and may show signs of wear typical for this group of parts. However, it is a fully functional service solution for users who want to restore the efficiency of the seat mounting area in their Mercedes Vito W639 without the need to invest in a new component. Replacing a damaged base with a functional used part allows for reduced repair costs while maintaining proper functionality and fit.

Expanding the modernization of the seat and console area

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

For users interested in a broader context of using original OEM components and the impact of such parts on the character and durability of the vehicle, an article comparing structural solutions across different model generations may be helpful – more information can be found in the post Classic Mini vs modern MINI – differences and OEM parts.