Mercedes W204 W212 Front Door Lock Mechanism Actuator Unit Left N/S A0997200735

Mercedes W204 W212 Front Door Lock Mechanism Actuator Unit Left N/S is a factory-made mechanism from the Locks and Latches category, designed for installation in the front left area of the vehicle body. This component is responsible for precise locking, unlocking, and integration with the central locking system, ensuring safe and convenient operation of the driver or passenger door on the left side.

Specifications and technical data

• SKU: RHD-A0997200735-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997200735
• Substitutable numbers: A2047203735, A 204 720 37 35, A0997200735, A 099 720 07 35
• Location on the vehicle: Front, Left
• Part type: Door Lock
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock mechanism is dedicated to the front left door in Mercedes C-Class W204 and E-Class W212 models. Its placement in the front left section of the body makes this component crucial for daily operation – it is responsible for proper closing, locking, and unlocking of the door, as well as for communication with the vehicle's electrical system. Thanks to a design tailored to the specific body generation, the lock ensures proper positioning relative to the striker in the pillar, stable cable routing, and correct actuator operation. This solution reduces the risk of play, rattling, or closing issues, which translates into user comfort and consistent operation of the entire locking system.

Mechanism construction and technical advantages

The front left door lock mechanism in the Mercedes W204 / W212 combines a mechanical part and a set of components responsible for central locking system integration in one housing. The applied design allows for:

• stable door locking when using the key or remote control,
• consistent operation with the vehicle's factory electrical system,
• proper transmission of external and internal handle movement,
• maintaining the correct door position relative to the body after closing. As an item from the Locks and Latches group, the lock is designed to work with factory cables, handles, and control modules, which facilitates installation and reduces the need for additional modifications.

Condition, fitment, and installation

The offered lock is a used part, sourced from dismantling, which allows for maintaining the factory specifications and fitment characteristic of original Mercedes solutions. This type of component is particularly beneficial for repairs where compatibility with vehicle equipment and maintaining the original functionality of the locking system is essential. The vehicle placement specified as front – left side makes it easy to select the element for the specific position on the body. With correct selection regarding the model and body version, installation is limited to replacing the lock in the factory location, while maintaining existing mounting points and cable routing.

Why choose this lock mechanism?

Choosing an original lock mechanism for the Mercedes W204 / W212 allows you to maintain consistent central locking operation, door handling comfort, and safety resulting from proper locking. This solution is especially recommended in situations where there are problems with closing, locking, or unlocking the door on the left side, as well as when replacing a damaged actuator or locking mechanism. If you are planning a comprehensive repair or upgrade of the front door area in your Mercedes and need other elements from the same group, such as lock mechanisms, latches, or related mounting elements, check the available parts in the Mercedes Locks and Latches category.

Support in choosing a used part

When selecting a used door lock, it is worth paying attention to compatibility with the model, production year, and body version, as well as the fitment to the specific side of the vehicle. A properly selected element allows you to reduce installation time and avoid problems with the operation of the central locking or handles. If you want to better understand the differences between original, aftermarket, and used parts and evaluate which solution will be most cost-effective in your case, the following article may be helpful: Original, aftermarket, or used – which car parts are the most cost-effective?.