Mercedes W221 Rear Door Lock Latch Mechanism Left N/S Assembly A2217306135

Mercedes W221 Rear Door Lock Latch Mechanism Left N/S Assembly is an original component from the Locks and latches category, designed for the rear left section of the vehicle body. It ensures proper locking, unlocking, and integration with the factory comfort systems in your Mercedes, maintaining consistency with the door structure and vehicle electronics. This is a practical solution for users who expect reliable mechanism performance while adhering to factory installation standards.

Specifications and technical data

• SKU: A2217306135
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217306135
• Substitutable numbers: A2217306135, A 221 730 61 35
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the lock

The presented lock is dedicated to the rear left side of the body in Mercedes W221 series models. It is responsible for the mechanical locking of the door, interaction with the interior and exterior handles, and proper closing during standard vehicle use. Thanks to its precise fit for the specific position on the vehicle, the correct geometry of the rods and catches is maintained, which translates into stable door opening and closing.

Construction and fitment to the door system

The lock is designed as a complete unit mounted in the inner part of the door panel. Its housing and working elements are prepared to work with the factory handle mechanism, guides, and wiring in the rear left door. The design includes appropriate mounting points, which facilitates installation in the original technological holes without the need for modifications.

The arrangement of the catches and levers is adapted to the specific door profile of the Mercedes W221, which reduces the risk of play, improper closing, or excessive resistance when shutting the door. As a result, after replacement, you can achieve repeatable mechanism performance, similar to the factory operation.

Benefits of using an original lock

Using a lock dedicated to a specific model and position on the vehicle brings measurable operational benefits. The most important include:

• maintaining compatibility with the factory door system and vehicle wiring,
• stable operation of the locking mechanism during daily use,
• reducing the risk of problems with closing or locking the door,
• easier diagnostics of potential future faults thanks to the use of a component from the same design group.

For the user, this means more predictable door behavior, and for the service center – simpler installation and no need to adapt universal solutions. As a result, replacing the lock can restore the comfort of using the rear left passenger area in your Mercedes.

Application in service practice

The component is suitable both for typical repairs after wear and tear, as well as for bodywork and paint repairs following damage to the side of the vehicle. Replacing the lock with a properly selected component allows for restoring correct locking, handle interaction, and consistency with other door system elements. This is particularly important in vehicles where passenger comfort in the rear seat and trouble-free door operation during frequent use are a priority.

Repair scope expansion and additional information

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, cylinders, or additional security features, check the available parts in the Mercedes Locks and latches category.

If you are interested in a broader context of using second-hand parts in vehicle service and want to better understand how to optimize repair costs while maintaining appropriate quality, it is worth reading the article: Smart Skoda servicing – why second-hand parts are the best choice for your wallet.