Mercedes W221 Door Lock Latch Mechanism Actuator Front Right O/S A2217203035

Mercedes W221 Door Lock Latch Mechanism Actuator Front Right O/S is a precision locking mechanism designed for installation in the front right door of the W221 S-Class sedan. The offered item is an original door lock actuator mechanism, ensuring proper locking, unlocking, and seamless integration with the factory central locking system and vehicle electronics.

Specifications and technical data

• SKU: RHD-A2217203035
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217203035
• Substitutable numbers: A2217203035, A 221 720 30 35, A 221 760 04 04, A2217600404
• Location on the vehicle: Front, Right
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock mechanism is dedicated to installation in the front right door of the vehicle, on the driver's side for right-hand drive versions or the passenger side for left-hand drive versions. It is responsible for:

• mechanical locking and unlocking of the door panel,
• integration with the central locking actuator,
• transmitting status information to comfort and safety systems,
• securely holding the door in the closed position while driving.

Thanks to its factory design, the lock maintains correct operating geometry, which translates into reliable door closing without the need for excessive adjustment of hinges or the door striker.

Construction and technical compatibility

The front right door lock mechanism for the Mercedes S-Class W221 belongs to the Locks and Latches category and has been designed as a component that works with factory handles, linkages, and the vehicle's electrical installation. This means:

• retaining original mounting points in the door shell,
• compatible electrical sockets for wiring harness connection,
• proper cooperation with comfort modules and the central locking system,
• correct fitment to the standard door striker on the body pillar.

The element has assigned interchangeable part numbers, which facilitates part selection based on manufacturer catalogs and allows for verifying compatibility with a specific vehicle equipment version.

Condition, functional advantages, and installation

The offered lock is a used part, sourced from dismantling, which allows for maintaining factory build quality while reducing repair costs. This type of solution is particularly beneficial for premium class models, where new original parts are significantly more expensive.

The main advantages of the product include:

• original design tailored to the Mercedes S-Class W221,
• integrated actuator that works with the central locking system,
• possibility of installation in place of the factory lock without structural modifications,
• maintaining full door functionality after proper installation.

During replacement, it is recommended to have the installation performed by an experienced service center, with a check of the striker adjustment and the correct operation of linkages and the handle, to ensure smooth and repeatable locking in all operating conditions.

Part selection by numbers and parameters

For certainty of fitment, it is worth comparing the markings with the existing lock and using data such as the OEM part number, interchangeable numbers, or the SKU designation in the store catalog. The vehicle placement parameter allows for unambiguously confirming that this is a component intended for the front right side of the body, which minimizes the risk of purchasing the wrong version.

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

Technical support and service cost optimization

When planning broader service work, it is worth familiarizing yourself with practical tips regarding economical vehicle operation and the use of used parts. Sensibly combining original components from the secondary market with professional installation allows for significantly reducing costs while maintaining a high level of safety and comfort. You can find more on this topic in the article Repairing a Volkswagen for pennies? Discover how to save on original car parts, the conclusions of which can also be applied to servicing other premium brands.