Mercedes W221 Door Lock Latch Mechanism Actuator Front Right O/S A2217208035

Mercedes W221 Door Lock Latch Mechanism Actuator Front Right O/S is a factory-spec locking mechanism with an integrated actuator, designed for installation on the passenger side. It offers precise central locking operation, seamless integration with the vehicle's electronics, and stable door latching. Thanks to its original design, the mechanism maintains full compatibility with the factory installation, which simplifies diagnostics and subsequent operation.

Specifications and technical data

• SKU: rhd-A2217208035-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217208035
• Substitutable numbers: A2217208035, A 221 720 80 35
• Location on the vehicle: Front, Right
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock mechanism is designed for installation in the front right door of a Mercedes W221. It is responsible for:

• mechanical locking and unlocking of the door,
• integration with the central locking system and remote control operation,
• proper operation of the exterior and interior door handles,
• maintaining a stable door position while driving.

By maintaining the original geometry and mounting points, the lock ensures proper latch guidance and correct operation of the position sensors, which is essential for user comfort and the performance of safety systems.

Construction and technical advantages

The mechanism combines a mechanical part and an electric actuator in a single housing, which reduces the number of connections and potential points of failure. The applied design ensures:

• consistent operation with the factory comfort module,
• appropriate rigidity of the lock housing,
• precise engagement of the locking elements,
• proper cooperation with door rods and guides.

The original lock from this series is designed specifically for the W221 door architecture, which translates into secure latching and repeatable mechanism performance even with frequent use.

Why it is worth using the original lock mechanism

For components such as Locks and latches, it is crucial to maintain full compatibility with the electronics and door construction. Choosing an original lock for the Mercedes W221 allows you to:

• minimize the risk of communication errors with control modules,
• avoid problems with the fitment of mounting holes and rods,
• maintain the factory operating parameters of the central locking system,
• preserve consistent operation with the other locks in the vehicle.

This solution is particularly recommended when replacing a damaged lock due to a collision, wear and tear, or issues with locking one side of the vehicle.

Condition and installation aspects

The offered item comes from a used vehicle, which allows for a favorable cost-to-functionality ratio. The mechanism is complete to the extent necessary for installation in the door, while retaining the factory mounting layout. During replacement, it is recommended to:

• check the condition of the door wiring harness and electrical connectors,
• inspect the adjustment of the handle rods,
• test the central locking operation after installation,
• verify the correctness of the locking mechanism through repeated opening and closing.

Thanks to the original design, the installation process is predictable, and the lock mechanism can be integrated into the existing system without any additional modifications.

Expanding the lock system in the Mercedes W221

If you are planning a comprehensive repair or upgrade of the door area 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.

To better plan your service and select the right components, it is also worth reading the guide on selecting original parts – you can find practical tips in the article Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?.