Mercedes W177 Door Lock Rear Left N/S Lock Mechanism Linkage A0997303601

Mercedes W177 Rear Left Door Lock is an original part from the Locks and Latches group, designed for installation in the rear left area of the body. The precise design of the lock ensures proper cooperation with the handle mechanism, rods, and electrical system, guaranteeing secure and stable door closing in daily use.

Specifications and technical data

• SKU: A0997303601
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997303601
• Substitutable numbers: A0997303601, A 099 730 36 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 dedicated to the rear left part of the body in W177 series models, where it is responsible for mechanical locking and unlocking of the door and cooperation with the central locking system. This component bears the loads resulting from frequent door opening and closing, while simultaneously maintaining the stable position of the door leaf relative to the body during driving.

Thanks to the factory design of the lock, the correct geometry of the rods and levers is maintained, which translates into repeatable operation of the interior and exterior handles, as well as correct response to signals from the remote control or buttons inside the vehicle.

Construction and Fit for Mercedes W177

The lock has been specifically designed for the rear left door architecture in the Mercedes W177, taking into account the shape of the panel, window guides, and internal reinforcements. The appropriate placement of mounting points facilitates installation in factory openings, without the need for modification of the door structure.

The original solution from the Locks and Latches group ensures compatibility with factory wiring harnesses and control mechanisms, which minimizes the risk of play, improper closing, or excessive vibrations during driving.

Benefits of Using an Original Lock

Using a lock dedicated to the rear left side of the Mercedes W177 allows for consistency with the factory safety and comfort system. Proper door locking contributes to:

• stable holding of the door in the closed position while driving,
• proper cooperation with the central locking system and cabin control,
• appropriate response to remote control signals,
• reduction of unwanted play and rattles within the door area.

For the user, this means predictable mechanism operation, convenience in daily vehicle use, and maintaining an appropriate level of safety for passengers on the rear seat.

Condition, Verification, and Installation

The part comes from a used vehicle, which allows for a favorable cost-to-functionality ratio, while maintaining compliance with factory construction standards. The lock is a particularly attractive solution in case of post-accident repairs, replacement due to mechanical wear, or problems with locking the rear left door.

Installation by a workshop experienced with Mercedes vehicles is recommended, which facilitates correct mechanism adjustment, proper routing of rods, and correct connection of the control system. Thanks to this, the lock can fully utilize its capabilities in terms of safety and user comfort.

Expanding the Lock System in Mercedes

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other parts from the same group, such as latch mechanisms, lock cylinders, or central locking actuators, check the available parts in the category Mercedes Locks and Latches.

More About Choosing Used Electronic Components

When planning repairs of comfort and safety systems, it is worth approaching the selection of used components consciously, especially when it comes to control modules and sensors cooperating with locks. Practical tips on selection by part numbers, compatibility verification, and installation can be found in the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.