Sliding Door Mercedes Vito W639 Rear Left Right Upper Lock Latch A6397400635

The Mercedes W639 Sliding Door Lock is an original part from the internal locks and latches category, designed for the rear body area. It allows for secure locking of the right or left sliding door, ensuring proper operation of the opening and closing mechanism and stable guidance of the door leaf.

Specifications and technical data

• SKU: A6397400635
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397400635
• Substitutable numbers: A6397400635, A 639 740 06 35
• Location on the vehicle: Rear, Right, Left
• Category: Interior Locks & Lock Hardware

Application and Vehicle Placement

The presented lock is intended for installation in the rear part of the body, on the right or left side, in the sliding door of the Mercedes W639 model. This placement requires precise alignment with the guides, rods, and factory locking system, making the choice of an original lock crucial for the correct operation of the entire mechanism.

Thanks to its construction conforming to factory Mercedes standards, the part works with existing rods, handles, and control mechanisms, which facilitates installation and reduces the need for additional modifications.

Technical and Functional Characteristics

The sliding door lock in the Mercedes W639 is responsible for:

• mechanical locking of the door leaf in the closed position,
• cooperation with the interior and exterior opening system,
• stabilizing the door during driving, even with frequent use of the cargo or passenger area.

The original design ensures proper fit with the door panel, guides, and adjustment elements, resulting in smooth closing and reduced play. This is particularly important in intensively used vehicles where the sliding door is one of the most heavily loaded body components.

Condition, Origin, and Benefits of Choosing a Used Part

The offered lock is a used part, sourced from vehicle dismantling. Such elements are often chosen as an economical alternative to new components, while maintaining original construction and compatibility with the factory locking system.

Choosing an original used lock allows you to:

• maintain compliance with original Mercedes solutions,
• reduce the risk of fitting problems typical of aftermarket parts,
• lower repair costs while preserving correct functionality.

Why Use an Original Mercedes W639 Sliding Door Lock

By using an original Mercedes W639 sliding door lock, you minimize the risk of leaks, incomplete closing, or excessive door play, which can lead to noise, vibrations, and faster wear of the guides. A properly selected part contributes to the comfort of daily vehicle operation, especially in commercial and fleet applications where sliding doors are used intensively.

This solution is recommended for both post-accident repairs and for replacing a worn locking mechanism when problems with door closing or locking arise.

Complementary Offer and Additional Materials

If you need other parts from the internal locks and latches category dedicated to this brand, check out the Mercedes internal locks and latches available in our store to complete the set for your specific vehicle configuration.

When selecting parts by OEM or VIN number and planning more extensive service work, a guide on the fuel system, diagnostics, and component regeneration may also be helpful – you can find it here: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Regeneration.