Door Lock Mercedes W177 W247 Latch Mechanism Actuator Rear Left N/S A0997303101

Visual condition of the part

The product shows signs of use visible in the photos.

Door Lock Mercedes W177 W247 Latch Mechanism Actuator Rear Left N/S is an original component from the Locks and latches group, designed for the rear left section of the vehicle body. It enables the proper operation of the door locking and unlocking mechanism, ensuring stable latching and safe vehicle use. This solution is dedicated to drivers who expect a proven design and the maintenance of factory-standard lock performance.

Specifications and technical data

• SKU: A0997303101-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997303101
• Substitutable numbers: A0997303101, A 099 730 31 01
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the rear left door lock

The presented lock is designed for installation in the rear left part of the body, which means it is matched to the specific geometry of the door and guides. It is responsible for:

• mechanical latching of the door leaf to the body,
• cooperation with the external and internal door handles,
• stable retention of the door in the closed position while driving.

Thanks to this, the locking system maintains proper rigidity, and the door does not move uncontrollably on its hinges, which translates into acoustic comfort and passenger safety.

Compatibility with the Mercedes platform

The lock has been developed with the body structure used in modern Mercedes compact models in mind, which ensures proper fitment with the door panel, window guides, and seals. Factory mounting geometry facilitates installation in place of the previous component, without the need for modifications or adaptations.

Such a fit is particularly important for maintaining the correct operation of the latching mechanism and cooperation with the vehicle's electrical system, if the lock interacts with the central locking or comfort systems.

Characteristics of the used component

The offered lock comes from the secondary market, which allows for economical repair while maintaining the original design. A used element of this type is a good choice when:

• the existing lock has suffered mechanical wear or damage,
• the door does not close properly or there is play in the latch,
• replacement is necessary after a collision in the rear left area of the body.

Original origin from the Mercedes group promotes the maintenance of proper door operation culture and compatibility with factory solutions used in the vehicle.

Benefits of using an original door lock

Choosing a lock dedicated to the rear left side of the body helps reduce the risk of problems with installation and subsequent operation. Key advantages include:

• secure door latching – proper closing and retention of the leaf in the closed position,
• maintenance of the factory door line relative to the body,
• consistency with the existing installation and door mechanics.

A locking system configured in this way promotes driving comfort, reduces unwanted noises from the door area, and supports the proper operation of passive safety systems.

Related items from the locks group

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

Technical support and service knowledge

When performing service work on the body and interior equipment, it is worth paying attention to the condition of other comfort systems, including air conditioning. For a better understanding of the principles of safe component replacement and typical symptoms of wear in auxiliary systems, you can use the advice contained in the article Air conditioning compressor – failure symptoms, causes, and safe replacement, which helps organize service knowledge and make informed decisions when selecting used parts.