Door Lock Mercedes W221 S221 Rear Left N/S Latch Mechanism Actuator A2217302935

The Mercedes W221 S221 Rear Left Door Lock is an original part from the Locks and Latches group, designed for the rear left area of the body. The precise construction of the lock ensures proper cooperation with the handle mechanism, latch, and electrical system, guaranteeing secure and stable door closing. This solution is dedicated to users who expect factory fitment and proven assembly quality in their Mercedes S-Class W221/S221 series.

Specifications and technical data

• SKU: A2217307935-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217307935
• Substitutable numbers: A2217307935, A 221 730 79 35, A2217302935, A 221 730 29 35
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Lock Purpose and Function

The presented lock is designed to operate in the rear left door area, where it is responsible for the mechanical locking of the door leaf and cooperation with the internal and external opening system. The construction intended for the W221/S221 platform ensures:

• correct positioning relative to the pillar and hinges,
• stable holding of the door in the closed position,
• smooth latch release upon opening,
• compatibility with the factory geometry of the Mercedes S-Class door.

Construction and Fitment for Mercedes W221/S221

The rear left door lock has been constructed as a dedicated element for a specific body generation, which translates to precise fitting with the door panel and pillar. The appropriately shaped housing and mounting points allow for installation in the original openings, without the need for modifications or adjustments.

The part belongs to the Locks and Latches group, thus cooperating with factory rods, handles, and other components of the locking system. This solution allows for the preservation of the original door operation characteristics – both in terms of closing force and the sound of the latch engagement.

Benefits of Using an Original Lock

Using a lock dedicated to the Mercedes W221/S221 in the rear left part of the body offers a number of practical benefits:

• Factory Fitment – no issues with position adjustment, proper latch guidance, and cooperation with seals.
• Consistency with Existing Door System – compatibility with original handles, rods, and internal mechanisms.
• Stable Operation in Daily Use – predictable locking and unlocking, which reduces the risk of doors not closing properly.
• Possibility of use in post-accident repairs or when replacing a worn-out lock without altering the door structure.

Condition and Service Application

The offered lock is a used part, making it an attractive solution for vehicle servicing where a reasonable repair cost is important while maintaining original specifications. It is suitable for replacing a mechanically damaged part as well as in situations where the existing lock shows signs of wear, such as difficult locking or unstable door holding.

Thanks to its construction being consistent with the factory design, the lock can be used in professional body and mechanical workshops, as well as by advanced users who service their Mercedes S-Class vehicles themselves.

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

If you are interested in a broader context of vehicle modification and want to better understand the impact of components on the car's character, it is worth reading the guide on exhaust systems and used parts – you will find it in the article Performance Exhaust Systems: Used Headers and Sport Catalytic Converters on the Road.