Mercedes W204 W212 Door Lock Latch Catch Actuator Front Right O/S A0997200635

Mercedes W204 W212 Door Lock Latch Catch Actuator Front Right O/S is an original component from the Locks and latches group, designed for installation in the front right door of the vehicle. It is a complete unit featuring a locking mechanism and an actuator, which ensures secure closing, locking, and unlocking of the door, as well as seamless integration with the factory central locking system.

Specifications and technical data

• SKU: RHD-A0997200635-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997200635
• Substitutable numbers: A0997200635, A 099 720 06 35
• Location on the vehicle: Front, Right
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock is dedicated to the front right side of the body in Mercedes C-Class W204 and E-Class W212 models. It is responsible for precise door latching, operation with both the exterior and interior door handles, and the central locking system. The integrated actuator controls the locking mechanism, allowing for convenient operation via the remote control or the interior cabin button.

Thanks to a design compliant with Mercedes factory standards, the lock maintains the correct mounting geometry, cable positioning, and electrical connections, which facilitates installation and reduces the risk of leaks or improper door operation.

Construction and technical advantages

The component combines a mechanical lock with a latch and an electric actuator in a single housing. This configuration ensures:

• stable door latching when closing,
• smooth cooperation with the central locking system and the vehicle's electrical installation,
• proper interaction with door position sensors (if present in the specific vehicle configuration),
• maintenance of factory-level passive safety.

The original Mercedes origin helps maintain the proper durability of the mechanism, resistance to operational loads, and compatibility with the vehicle's factory software. Precise fitment with the door panel reduces noise, play, and unwanted vibrations while driving.

Condition, fitment, and installation

The product is in used condition, which allows for an economical replacement of a damaged lock while maintaining original build quality. The vehicle placement is clearly defined as front – right side, which facilitates the selection of the correct part when planning repairs.

During installation, it is recommended to:

• check the correct operation of the interior and exterior handle cables,
• verify the integrity of the vapor barrier/foil in the door after removing the upholstery,
• inspect electrical connectors for corrosion and connection stability.

Proper selection of the lock for the specific body version is crucial for correct cooperation with the comfort electronics and the central locking system.

Application in diagnostics and repair

The front right door lock in the Mercedes W204 / W212 is often replaced in cases of symptoms such as no response to central locking commands, problems with opening from the inside or outside, or intermittent door closing issues. Replacing the complete mechanism with the actuator is usually a faster and more predictable solution than repairing individual sub-components.

Combined with proper adjustment of the hinges and the lock on the body pillar, it is possible to restore proper door closing, reduce rattling, and improve acoustic comfort inside the vehicle.

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

For drivers interested in a broader approach to vehicle service, including proper diagnostics of electrically controlled components, the article describing the principles of selecting and operating sub-components according to OEM numbers and VIN may be helpful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.