Door Lock Mercedes W212 W204 Rear Left N/S Latch Mechanism Actuator A0997300535

Mercedes W212 W204 Rear Left Door Lock is an original part from the Locks and Latches group, designed for installation in the rear left door of Mercedes W212 and W204 class vehicles. The used lock ensures a factory fit, proper cooperation with the handle mechanism and electrical system, and stable operation of the central locking system.

Specifications and technical data

• SKU: A0997300535
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997300535
• Substitutable numbers: A0997300535, A 099 730 05 35
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Door Lock Purpose and Function

The presented lock is responsible for the mechanical locking and unlocking of the rear left door, as well as for proper cooperation with the central locking system and the child lock function. Its placement on the vehicle is the rear left side, which is crucial when selecting parts for a specific body type and door configuration.

Thanks to its construction in line with factory Mercedes standards, the part maintains the correct mounting geometry, position relative to the window and guides, and the correct path of operation for the rods and handle linkages. This allows for precise door closing, reduced play, and stable operation over a longer service life.

Benefits of Using an Original Lock

Using an original lock in the rear left door offers a number of practical benefits:

• factory fit to the door structure in W212 and W204 models,
• proper cooperation with the central locking system and vehicle's electrical system,
• maintaining the correct door position relative to the body when closed,
• reducing the risk of jamming, incomplete closing, or accidental opening while driving,
• possibility of direct replacement of a damaged part without modifications.

A used lock from this group is a good solution when the existing part has become worn, mechanically damaged, or has stopped cooperating with the vehicle's locking control system.

Selection and Installation in the Vehicle

When selecting a lock for a Mercedes W212 or W204, it is crucial to pay attention to its placement on the vehicle (rear, left side) and compatibility with the body. This lock model has been specifically designed for the rear left pair of doors, which simplifies installation and helps maintain the vehicle's original functionality.

In practice, installation involves removing the door trim, disconnecting the rods and electrical connectors, and then transferring the lock to its factory position. By retaining the original design, existing mounting points and factory guides can be utilized, reducing work time and minimizing the risk of installation errors.

Application in the Vehicle's Safety System

A functional door lock in the rear left part of the body is important not only for usability but also for passenger safety. It is responsible for keeping the door in the closed position while driving, cooperates with the child lock function, and with the central locking system, which is particularly important when carrying passengers on the rear seat.

In case of symptoms such as problems with closing, no response to the central lock, or irregular mechanism operation, replacing the lock with a functional part from the same group is the recommended service solution.

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

To better plan maintenance work on the body and locking components before the low-temperature season, it is worth reading the guide on preparing your car for winter: Winter Essentials: Which Used Car Parts Are Worth Checking and Replacing Before the Frosts?.