Mercedes Vito W639 Door Lock Rear Right O/S Mechanism Latch A6397400335

Mercedes Vito W639 Door Lock Rear Right O/S Mechanism Latch is an original component from the Locks and Latches category, designed for the rear right section of the vehicle body. It ensures secure locking of the door panel, stable operation with the factory opening mechanism, and proper closing, which translates into safe vehicle usage.

Specifications and technical data

• SKU: A6397400335
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397400335
• Substitutable numbers: A6397400335, A 639 740 03 35
• Location on the vehicle: Rear, Right
• Category: Exterior Locks & Lock Hardware

Purpose and vehicle placement

The presented lock is dedicated to the rear right part of the body in the Mercedes Vito W639 model. Its placement in the rear passenger-side door area means that the component is responsible for the correct locking and unlocking of this specific door, working in conjunction with the factory handle and control mechanism.

Thanks to its precise fit to the door structure, the lock maintains the correct closing geometry, minimizes play, and reduces unwanted vibrations while driving, which contributes to acoustic comfort and the stability of the entire mechanism.

Construction and technical function

As an element from the Locks and Latches category, the door lock is responsible for several key operational functions:

• mechanical locking of the door panel in the closed position,
• smooth unlocking using the handle or central control system,
• stable guidance of the lock tongue relative to the striker on the body,
• maintaining a repeatable door closing position.

The appropriate internal design ensures consistent performance over repeated opening and closing cycles, which is essential in a commercial vehicle such as the Vito, where the rear doors are heavily used.

Benefits of using an original lock

Using a lock dedicated to a specific vehicle model allows for maintaining the factory performance parameters of the door mechanism. The most important advantages include:

• secure door closing without the need for excessive force,
• proper cooperation with the existing control system and handles,
• maintaining the seal of the door perimeter, which reduces noise and drafts,
• reduced risk of damage to hinges and sheet metal resulting from improper locking.

As a result, the lock is suitable both for typical replacement of a worn-out part and for post-accident repairs where restoring the correct geometry and functionality of the door is required.

Characteristics of the used component

The offered lock comes from a used vehicle, meaning it is a pre-owned part that retains functionality consistent with its intended purpose. This type of solution is particularly cost-effective for repairs of commercial vehicles, where a reasonable balance between quality and service budget is important.

Choosing a used door lock allows for reducing repair costs while maintaining compatibility with the factory locking system. It is a practical solution for workshops, fleets, and individual users who expect the mechanism to work efficiently without the need to invest in a new component.

Support with selection and the ecological aspect of repair

Selecting the right lock for the rear right part of the body is important for maintaining safety and vehicle comfort. In case of doubt, it is worth verifying the compatibility of the component with the specific body version and door configuration to avoid installation problems and ensure the correct operation of the mechanism.

If you are interested in a broader context of using components from this group in vehicles of this brand, and you also want to see other solutions from the same family, check out the offer in the Mercedes Locks and Latches category.

If you want to better understand how reusing functional components affects the environment and vehicle operating costs, read the article Eco-driving: discover the benefits of used car parts, which discusses the practical advantages of using pre-owned components in the automotive industry.