Mercedes W221 Front Door Left N/S Lock System Actuator Mechanism A2217202735

The Left Front Door Lock for Mercedes W221 is an original locking mechanism designed for installation on the passenger side in right-hand drive versions. This component belongs to the Locks and Latches group and is responsible for precise control of the locking and unlocking of the left front door, ensuring proper integration with the vehicle's factory electrical system. This solution is dedicated to users who expect compatibility with the factory closing system in the Mercedes S-Class W221 generation.

Specifications and technical data

• SKU: rhd-A2217202735
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217202735
• Substitutable numbers: A2217202735, A 221 720 27 35, A 221 720 59 35, A2217205935
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Intended Use and Function in the Vehicle

The presented lock mechanism is designed to operate in the left front door of the W221 body, where it is responsible for locking, unlocking, and interacting with the external and internal door handles. Its placement in the front cabin area requires precise fitting to the door structure, guides, and linkages, which is why using an original lock significantly simplifies installation and subsequent operation.

The mechanism plays a crucial role in the daily use of the vehicle – comfortable entry, security while parked, and proper cooperation with the central locking system and remote control depend on its correct functioning. Using a dedicated component allows for maintaining the factory door operation characteristics without the need for system modifications.

Mechanism Construction and Compatibility

The left front door lock for the Mercedes W221 is a mechanical-electrical assembly where a precise pawl system works with an actuator and position sensors. This enables the operation of locking functions via remote control, the interior button, and the door handle, as well as transmitting door status information to the vehicle's systems. The construction is adapted to the W221 door geometry, ensuring proper fit with the door panel, window guides, and seals.

Its original origin from the Mercedes group signifies compliance with factory quality standards, as well as the availability of interchangeable part numbers, which facilitate part selection for different model years and equipment versions. The mechanism is designed to work with the factory wiring and body control modules, minimizing the risk of communication errors and diagnostic issues.

Condition, Verification, and Benefits of Use

This item comes from the used Locks and Latches category, allowing for a favorable purchase cost while retaining the original manufacturer's design. Before being offered, the lock is verified for correct mechanism operation, response to control signals, and smooth operation of the pawls, to ensure stable daily performance for the user.

Using an original lock in the left front door of the W221 offers a number of practical benefits:

• maintaining factory fit to the door structure and central locking system,
• proper cooperation with body electronics and comfort systems,
• reducing the risk of improper door closing or locking,
• the ability to utilize existing mounting points and linkages.

Professional Selection and Service Application

The left front door lock mechanism for the W221 is suitable for both professional Mercedes-specific service centers and independent workshops performing body and comfort system repairs. With a clear definition of its vehicle placement, it is easy to avoid errors when selecting the correct side and position within the body. This is particularly important for collision repairs and for replacing parts after intensive use.

For functional tuning or restoring the full functionality of the closing system in the Mercedes S-Class W221, using an original lock helps maintain consistent operation across all doors, which is important for both comfort and the proper functioning of the vehicle's security systems.

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

For those interested in expanding the vehicle's capabilities or optimizing service costs while maintaining high quality, it is worth familiarizing yourself with tips on selecting used components – practical advice can be found in the article Best Used Parts for Your Car Tuning.