Mercedes A-Class W168 Rear Left Door Lock Latch Mechanism Actuator A1687300935

Mercedes A-Class W168 Rear Left Door Lock Latch Mechanism Actuator is a precision locking mechanism designed for installation in the rear left section of the vehicle body. This component is responsible for secure door closure, proper locking, and integration with the central locking system, which directly impacts the safety and comfort of the vehicle. With a design compliant with Mercedes factory standards, the lock ensures stable operation of the door system during daily use.

Specifications and technical data

• SKU: A1687300935
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1687300935
• Substitutable numbers: A1687300935, A 168 730 09 35, EM
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function in the vehicle

The presented lock mechanism is dedicated to the rear left side of the body in the Mercedes A-Class W168 model. It is responsible for:

• mechanical locking of the door leaf against the body pillar,
• stable retention of the door in the closed position while driving,
• proper cooperation with the internal and external door handles,
• operation of the opening and closing functions via the central locking system.

Thanks to its precise fit to the A-Class W168 door structure, the lock maintains the correct geometry of the rods and levers, which reduces the risk of jamming and closing issues.

Mechanism construction and advantages of use

The rear left door lock mechanism in the Mercedes A-Class W168 combines a mechanical part with elements responsible for interacting with the lock control system. This solution ensures:

• consistency with the vehicle's factory security system,
• adequate pressure of the door against the seals,
• repeatability of operation during repeated opening and closing,
• preservation of the original operating characteristics of the handles and latches.

Using an original design intended for a specific model allows for maintaining proper door-to-body alignment, which is important for both acoustic comfort and protection against moisture.

Benefits of installing a dedicated lock

Replacing a worn or damaged lock with a component compliant with the A-Class W168 factory specification allows for the restoration of the proper operation of the entire door module. Key benefits include:

• restoration of full functionality for opening and closing the rear left door,
• increased safety for passengers in the rear seat,
• elimination of problems with incomplete closing, door bouncing, or lack of response to the central locking signal,
• maintenance of consistency with the vehicle's factory security system.

Selecting the correct lock for the specific mounting location on the body limits the need for modifications and allows for efficient installation in a workshop or during DIY repairs.

Component condition and practical application

The offered rear left door lock comes from a Mercedes vehicle and is an item from the Doors and door panels category. As a used part, it is a reasonable choice for maintenance repairs when the priority is to maintain the factory design while optimizing service costs. A properly selected lock allows for restoring correct door operation without interfering with the body structure.

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other components from the same group, such as panels, reinforcements, or complete door leaves, check the available parts in the Mercedes Doors and door panels category.

Additional technical support

When planning broader service work, it is worth considering the general condition of body and suspension components to avoid unnecessary vehicle downtime. Expert materials regarding structural differences and principles of safe part selection can be helpful in choosing used components. More practical information can be found in the article Stock vs. sports suspension – design differences and is it worth buying used suspension parts?, which discusses key aspects of selecting used elements in the context of durability and safety.