Mercedes Vito W639 Door Lock Latch Actuator Mechanism Front Left N/S A6397201435

The Mercedes Vito W639 Door Lock Latch Actuator Mechanism Front Left N/S is a factory-fitted locking system component, responsible for precise locking and unlocking of the passenger-side door in right-hand drive versions. This original lock with actuator ensures proper integration with the vehicle's electrical system and comfortable operation of the central locking. Thanks to its design tailored to the specific Vito generation, the component maintains correct mounting points and operating geometry.

Specifications and technical data

• SKU: rhd-A6397201435-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397201435
• Substitutable numbers: A6397201435, A 639 720 14 35
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Purpose and vehicle placement

The presented mechanism is designed for installation in the front left door of the Mercedes Vito W639, in the body area responsible for cabin access. The lock assembly works in conjunction with the handle, linkages, and electrical wiring, and is responsible for:

• mechanical locking of the door panel against the body pillar,
• transferring movement from the external and internal handles,
• operating the central locking function via the built-in actuator,
• stably keeping the door in the closed position while driving.

Construction and function of the lock mechanism

The front left door lock mechanism in the Vito W639 is an integrated assembly of mechanical and electrical components. Inside the housing, latches, levers, and springs work to ensure smooth locking, while the electrical part communicates with the vehicle's comfort module. This solution allows for:

• consistent operation with the factory central locking system,
• maintaining the correct operating direction for the front left side,
• reduction of play and unwanted noises when opening and closing the door.

Due to its fitment for the specific Vito generation, the geometry of the catches and mounting points complies with factory body requirements, which facilitates installation and subsequent operation.

Benefits of using an original lock

Using an original lock mechanism in the Mercedes Vito W639 brings a number of practical operational benefits:

• Compatibility with the vehicle's system – the lock works with factory wiring, controls, and central locking logic, without the need for modifications.
• Proper fit to the door – correct tolerances are maintained, which reduces the risk of the door not closing properly or excessive resistance when closing.
• Consistency with other locking system components – the mechanism operates to the same standard as the other locks in the vehicle.
• Ability to restore correct door operation on the passenger side in RHD versions when the existing lock has suffered mechanical wear or electrical damage.

Performance characteristics and installation

The offered item comes from the Locks and Latches group, which means it has been designed to withstand the loads resulting from daily opening and closing of the door. As a used part, the mechanism may show signs of wear typical for this type of component, yet it retains the functionality necessary for continued service in the vehicle.

During installation, it is important to correctly seat the lock in the door panel, properly connect the electrical harness, and adjust the position relative to the pillar catch. This allows for:

• smooth door closing without excessive force,
• correct response to signals from the remote control and door lock,
• stable maintenance of the door in the closed position during driving and parking.

Expanding the locking system in the Mercedes Vito

If you are planning a comprehensive repair or upgrade of the cabin access area in your Mercedes and need other components from the same group, such as additional lock mechanisms, latches, or elements working with the central locking system, check the available parts in the Mercedes Locks and Latches category.

To better understand the importance of selecting the right used OEM components in modern cars, it is worth reading an article describing the comparison of turbochargers in Mini sports engines – you can find it here: Go-Kart Feeling XXL – used N18 turbocharger versus B48 in Mini Cooper S.