Mercedes Vito W639 Rear Seat Buckle Belt Seatbelt Lock Right O/S A6398600569

Mercedes Vito W639 Rear Seat Buckle Belt Seatbelt Lock Right O/S is an original component installed in the rear right section of the cabin, responsible for secure and reliable seatbelt locking. This component from the Seats and benches group ensures proper seatbelt anchoring, which translates into stable passenger retention during daily vehicle operation. Thanks to its factory origin, compatibility with the seat structure in the Mercedes Vito W639 is maintained.

Specifications and technical data

• SKU: A6398600569
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6398600569
• Substitutable numbers: A6398600569, A 639 860 05 69
• Location on the vehicle: Rear, Right
• Category: Seats and Sofas

Purpose and function in the safety system

The described seatbelt buckle lock operates in the rear right part of the interior and serves as the final attachment point for the seatbelt for the passenger sitting in the corresponding seat. Its task is to mechanically lock the seatbelt tongue and keep it in a stable position during driving, braking, and potential emergency maneuvers. The lock design is matched to the geometry of the seat and the seatbelt routing in the Mercedes Vito W639, which minimizes the risk of improper webbing alignment and improves buckling ergonomics.

Compatibility with Mercedes Vito W639

Mercedes Vito W639 Rear Seat Buckle Belt Seatbelt Lock Right O/S has been designed specifically for installation in the rear body section of the Mercedes Vito W639. This means compatibility with factory mounting points in the seat or bench structure and a perfect fit for the standard seatbelts used in this model. Using an original solution eliminates the need for modifications, and installation is based on existing mounts and guides provided by the vehicle manufacturer.

Characteristics of the used component

The product comes from dismantling and is offered as a used original part, which in practice means a beneficial combination of factory quality and an attractive price. The buckle retains its seatbelt locking function while allowing for an economical repair of the safety system in a vehicle where the original lock has been damaged or worn out. Choosing an original component from the secondary market reduces the risk of fitment issues typical of universal aftermarket replacements.

Installation in the rear right zone

The location on the vehicle defined as rear right facilitates the identification of the correct installation point in the cabin. The buckle works with the seat or bench structure in this part of the vehicle, and its geometry is adapted to the passenger's position and the seatbelt path. When replacing, it is recommended to follow the disassembly and assembly sequence in accordance with Mercedes service procedures, which allows for maintaining full system functionality and avoiding stress on the mounts.

Integration with interior equipment

As an element from the Seats and benches group, the seatbelt lock contributes to the passenger restraint system in the rear of the vehicle. A properly selected buckle ensures consistency with other seat components, such as frames, guides, or the seatbelts themselves. This maintains usage ergonomics – easy buckling and unbuckling, the correct operating angle of the lock, and a comfortable position of the belt on the passenger's body.

If you are planning a comprehensive repair or upgrade of the rear seating area in your Mercedes and need other elements from the same group, such as backrests, seat cushions, or complete benches, check the available parts in the Mercedes Seats and benches category.

Comfort and vehicle value vs. dismantled parts

Replacing a seatbelt lock in the rear of the vehicle often accompanies broader interior work – for example, when changing seats, benches, or the entire seating set. In such situations, it is worth considering the use of branded components from the secondary market, which allow you to refresh the cabin and improve functionality without overstretching your budget. To better plan your interior upgrade and utilize the potential of dismantled parts, it is worth reading the guide: Interior metamorphosis: How branded seats from dismantling will drastically improve comfort and increase the value of your car.

Summary

Mercedes Vito W639 Rear Seat Buckle Belt Seatbelt Lock Right O/S is a practical solution for users who want to restore full functionality of the safety system in the rear of the vehicle while maintaining the factory standard of workmanship. Original origin, fitment for a specific mounting location, and integration with the seat and bench structure make it a sensible choice for repairs and interior upgrades of the Mercedes Vito W639.