Mercedes W205 Door Lock Latch Mechanism Actuator Rear Right O/S A0997304200

Mercedes W205 Rear Right Door Lock Actuator is an original part from the Locks and Latches category, designed for the rear right door. This used actuator ensures a factory fit, proper integration with the vehicle's electrical system, and stable central locking operation, resulting in secure and predictable door closure.

Specifications and technical data

• SKU: A0997304200
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997304200
• Substitutable numbers: A0997304200, A 099 730 42 00
• Location on the vehicle: Rear, Right
• Category: Exterior Locks & Lock Hardware

Vehicle Application and Placement

The presented lock actuator is designed for installation in the rear right door of the W205 Mercedes-Benz, according to the factory design. Its precise placement on the vehicle ensures it works with the original guides, linkages, and wiring harness without requiring any structural modifications.

This perfect fit allows for the preservation of the original closing geometry, correct latch positioning relative to the door pillar, and proper functioning of the door status sensors.

Function and Role in the Locking System

The lock actuator is responsible for:

• mechanically locking the door in the closed position,
• transmitting motion from the door handle and central locking actuator to the latch,
• integrating with the vehicle's safety system (door closure monitoring),
• securely holding the door in the closed position while driving.

Thanks to its construction, which aligns with Mercedes' original solutions, the lock maintains its proper operating characteristics – a perceptible closing feel, consistent performance, and compatibility with the factory body settings.

Technical Specifications and Benefits of Use

As a component within the Locks and Latches group, this actuator is designed to operate under the variable conditions typical for door areas: exposure to vibrations, temperature changes, and humidity. Its design anticipates integration with factory mounting points, simplifying installation and reducing replacement time.

Using an original part allows for:

• maintaining consistency in the locking system with the other doors,
• preserving the correct operation of the central locking and opening indicators,
• minimizing the risk of doors not closing properly or opening accidentally while driving.

The used nature of this part makes it an economical solution while retaining the factory design and intended purpose.

Practical Installation and Operational Tips

When replacing the actuator, it is recommended to check the condition of the guides, hinges, and door alignment with the body to fully leverage the properties of the newly installed component. A correctly installed lock should provide smooth locking, a distinct closing feel, and proper interaction with both the interior and exterior door handles.

It is also advisable to inspect the wiring harness in the door grommet to prevent interference with the central locking system and potential warning light errors on the instrument cluster.

Selecting Locks and Latches for Mercedes

If you need other locking system components for your Mercedes-Benz, such as actuators for other doors or additional locking mechanisms, please check the available parts in the Mercedes Locks and Latches category.

To better assess when an original used part is a better choice than a new aftermarket replacement, a practical guide may be helpful – find more information in the article 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement.