Mercedes W168 Rear Left Door N/S Lock Latch Mechanism Actuator A1687301535

Mercedes W168 Rear Left Door N/S Lock Latch Mechanism Actuator is a factory-original component from the Locks and latches group, designed for the rear left side of the vehicle body. It enables the locking mechanism to work correctly with the door handle and central locking system, ensuring stable closing and secure locking of the door in your Mercedes.

Specifications and technical data

• SKU: A1687301535
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1687301535
• Substitutable numbers: A1687301535, A 168 730 15 35
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the rear left door lock

The presented lock is dedicated for installation in the rear left part of the vehicle body, which guarantees a proper fit to the door structure and guides. It is responsible for the mechanical locking of the door leaf, interaction with the internal and external handle rods, and maintaining the door in a closed position while driving.

Thanks to a design consistent with the solutions used by the vehicle manufacturer, the lock maintains the correct geometry of the catches and mounting points, which facilitates installation and reduces the need for additional adjustments after fitting.

Benefits of using an original Mercedes lock

Using an original lock in a Mercedes W168 allows you to maintain the consistency of the locking system throughout the vehicle. A proper fit to the door and body translates into:

• stable door closing without excessive force,
• correct interaction with the handle mechanism,
• preservation of the factory door-to-body alignment,
• reduction of the risk of play and rattling while driving.

For the user, this means more predictable mechanism operation, and for the service center – easier diagnostics and maintenance in the future. By choosing this component, you benefit from a solution designed specifically for the given model, which is crucial when repairing the locking system.

Installation and operational characteristics

The lock is intended for installation in the rear left zone, which eliminates the problem of fitting universal replacements. The design provides for cooperation with factory mounts in the door as well as standard rods and guides. Thanks to this, the replacement process can be carried out in an orderly manner, following standard service procedures.

The used nature of the part makes it a cost-effective solution while maintaining the original design. This is a good option for maintenance repairs when the priority is to restore full lock functionality within a reasonable budget.

Application in the vehicle safety system

A functional door lock is important not only for utility but also for safety. It is responsible for keeping the door in a closed position while driving, which is essential during sudden maneuvers or on uneven surfaces. A properly operating locking mechanism reduces the risk of accidental door opening and supports the operation of passenger safety systems.

In combination with other elements from the Locks and latches group, it creates a coherent system that should be kept in good technical condition, especially in vehicles used intensively in urban traffic.

Repair expansion and additional information

If you are planning a comprehensive repair or upgrade of the door and locking zone in your Mercedes and need other elements from the same group, such as locking mechanisms, cylinders, or additional locking modules, check the available parts in the Mercedes Locks and latches category.

If you are interested in a broader context of repair cost-effectiveness using used parts and the impact of component design on service costs, it is worth reading the comparative analysis of Volkswagen power units in the article Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs, which shows how conscious part selection can translate into long-term savings.