Mercedes Vito Viano W639 Rear Tailgate Boot Lid Lock Catch Latch A6397401635

Mercedes Vito Viano W639 Rear Tailgate Boot Lid Lock Catch Latch is an original component from the Locks and Latches category, designed for the rear body section. It ensures secure closing of the tailgate, stabilizes its position while driving, and supports the proper operation of the opening and locking mechanism. This is a practical solution for users who want to restore full functionality to the tailgate of their Mercedes vehicles.

Specifications and technical data

• SKU: A6397401635-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397401635
• Substitutable numbers: A6397401635, A 639 740 16 35
• Location on the vehicle: Rear
• Category: Exterior Locks & Lock Hardware

Purpose and function of the tailgate lock

The presented lock is dedicated to the tailgate of Mercedes Vito and Viano W639 generation models. It is responsible for the mechanical locking of the tailgate, working with rods or actuators, and securely holding the tailgate in the closed position. A properly functioning lock reduces the risk of accidental opening while driving, which is important for both cargo safety and vehicle comfort.

Construction and body fitment

The lock is structurally adapted to the rear body of the W639, allowing it to work with factory hinges, the striker, and tailgate paneling elements. The mounting holes and the shape of the housing are prepared for the original mounting points in the vehicle, which facilitates installation and helps maintain the correct closing geometry. This solution minimizes the need for modifications and allows for maintaining the factory standard of the mechanism's operation.

Benefits of using an original lock

Using an original tailgate lock in a Mercedes Vito/Viano W639 allows you to maintain consistency with the other elements of the locking system. The main advantages include:

• secure closing of the tailgate and stable locking while driving,
• compatibility with factory body elements and the opening mechanism,
• maintaining the operating characteristics of the tailgate as intended by the manufacturer,
• reduction of unwanted play and noise in the rear part of the vehicle.

As a result, the user receives a solution that supports the daily operation of a commercial or passenger vehicle, ensuring convenient access to the cargo area.

Condition of the component and service application

The offered lock comes from a used vehicle, making it an attractive service alternative for drivers looking for parts at a reasonable price while maintaining the original manufacturer's specifications. This type of component is particularly useful for post-accident repairs, replacing worn-out locking mechanisms, or restoring full tailgate functionality after intensive vehicle use.

Mounting zone and importance for safety

The lock operates in the rear body zone, where it is responsible for keeping the tailgate in the closed position. A properly selected and functional locking mechanism:

• increases the safety of the transported cargo,
• limits the ingress of noise and contaminants into the interior,
• supports the proper operation of seals and paneling elements.

Thanks to this, the vehicle maintains functionality in accordance with the manufacturer's assumptions, and the user can comfortably use the cargo space.

If you are planning a comprehensive repair or upgrade of the rear body area in your Mercedes and need other elements from the same group, such as locking mechanisms, strikers, or lock cylinders, check the available parts in the Mercedes Locks and Latches category.

For drivers interested in deepening their knowledge about part selection, compatibility, and OEM markings for more advanced systems, the Global Parts guide regarding BMW units may be helpful – you can find it in the article BMW B58 Code – checklist before buying a turbocharger and intercooler, which shows how to consciously approach the purchase of components on the secondary market.