Mercedes X166 Door Lock Latch Mechanism Actuator Rear Left N/S A0997304700

Mercedes X166 Door Lock 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. The mechanism ensures proper integration with the factory locking system, central locking, and door handle, guaranteeing stable and predictable operation of the system. It is a practical solution for users who want to restore full door functionality without compromising on body fitment.

Specifications and technical data

• SKU: A0997304700
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997304700
• Substitutable numbers: A0997304700, A 099 730 47 00
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the lock mechanism

The presented lock mechanism is dedicated to the rear left part of the body in the Mercedes X166 model. It is responsible for precise door locking, interaction with rods, the external and internal door handle, and the central locking control system. Thanks to the factory design, the correct operating geometry is maintained, which reduces the risk of improper closing, play, or incorrect latch engagement.

This component is particularly important in vehicles equipped with advanced comfort systems, where the proper operation of the lock affects door sealing, interior acoustics, and the safety of passengers in the rear seat.

Construction and fitment for Mercedes X166

The lock mechanism has been designed by the vehicle manufacturer with the specific construction of the rear left door in the Mercedes X166 in mind. This means appropriate placement of mounting points, the correct body shape, and compatibility with factory guides and rods. Such a solution facilitates installation and allows for maintaining the original door operating line without the need for modifications.

By using an original part from the Locks and latches group, consistency with other elements of the vehicle's locking system is maintained, which is important for both durability and proper interaction with the body electronics.

Benefits of using an original mechanism

Choosing an original lock mechanism for the rear left side of the body brings a number of practical benefits:

• secure door locking and stable holding of the door in the closed position,
• proper interaction with the factory central locking and remote control,
• maintenance of factory assembly clearances and closing geometry,
• reduction of the risk of slamming, jamming, or door bouncing when closing.

For workshops and users, this means shorter installation time, fewer corrections, and greater predictability of the entire locking system after replacing the component.

Condition, origin, and service application

The lock mechanism comes from a Mercedes vehicle and is a used component, which makes it an attractive cost-effective alternative to new parts while maintaining the factory design. It works well both for standard repairs after a lock failure and for replacing the component after mechanical damage to the door.

Due to its dedicated placement in the rear left part of the body, this part is particularly useful for repairs after side collisions or when dealing with problems with closing and locking one specific door.

Related components and development of the locking system

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

For those interested in broader use of salvaged parts in modernization and tuning projects, practical tips on component selection, cost optimization, and safety can be found in the article: Emotions and design – visual and mechanical tuning of a Seat using salvaged components.