Mercedes W221 Door Lock Rear Left N/S Actuator Catch Mechanism A2217201535

Description

Mercedes W221 Door Lock Rear Left N/S Actuator Catch Mechanism is an original locking mechanism designed for installation in the rear left part of the vehicle body. This component belongs to the Locks and latches group and is responsible for precisely locking and unlocking the door, ensuring proper integration with the factory central locking system. Using this component allows for a technical, cost-effective, and factory-compliant repair of the locking system in your Mercedes S-Class W221.

Specifications and technical data

• SKU: A2217201535
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217201535
• Substitutable numbers: A2217201535, A 221 720 15 35
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock is dedicated for installation in the rear left door of the vehicle, meaning its design, mounting points, and geometry work precisely with this specific area of the body. The mechanism is responsible for:

• mechanical locking of the door leaf against the bodywork,
• cooperation with the central locking actuator,
• proper closing and maintaining the door in a closed position while driving.

Thanks to this, the locking system maintains factory tightness, reduces noise, and ensures an appropriate level of safety for passengers in the rear seat.

Construction and technical compatibility

The lock mechanism was designed by the vehicle manufacturer with full integration with the factory electrical installation and comfort control in mind. This means:

• compatibility with original wiring harnesses and connectors in the door,
• proper cooperation with the comfort module and central locking,
• proper fitment to the guides, handle, and rods in the rear left door.

Such a solution facilitates installation and reduces the risk of fitment issues that often occur with low-quality replacements. The original Mercedes W221 door lock allows for maintaining the consistency of the entire locking system in the vehicle.

Condition, origin, and benefits of using a used part

The element comes from disassembly and is offered as a used part, which is a beneficial solution for users looking for original components at a reasonable price. Compared to cheap replacements, the used OEM lock ensures:

• preservation of the factory operating parameters of the mechanism,
• consistency of operation with other locks in the vehicle,
• reduction of the risk of central locking electronics issues.

It is a practical choice for post-accident repairs, replacing a damaged lock, or restoring full door functionality after an actuator or locking mechanism failure.

Installation and operational tips

Before installation, it is recommended to verify the compatibility of the part with the specific vehicle equipment version and to check the condition of the installation in the door. During installation, it is worth paying attention to:

• correct positioning of the rods and cables between the handle and the lock,
• precise connection of electrical connectors,
• checking the operation of the central locking and remote locking after installation.

Regular inspection of the mechanism’s operation and periodic lubrication of moving parts allow for maintaining smooth operation and reducing wear in the long term.

Expanding the locking system in your Mercedes

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements 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 take care of the durability of installed components from disassembly, including door locks, it is worth reading practical tips regarding maintenance and operation – you will find them in the article How to extend the life of used car parts?.