Mercedes W415 Rear Door Lock Actuator Latch Mechanism Left N/S A4157300535

Mercedes W415 Rear Door Lock Actuator Latch Mechanism Left N/S is a factory-original locking system component designed for the rear left side of the vehicle body. This used, fully functional actuator ensures proper integration with the central locking system, guaranteeing secure closing, unlocking, and stable door operation. By maintaining the original design, the Mercedes W415 Rear Door Lock Actuator Latch Mechanism Left N/S allows for precise fitment in the Mercedes W415 series vehicle.

Specifications and technical data

• SKU: A4157300535
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4157300535
• Substitutable numbers: A4157300535, A 415 730 05 35
• Location on the vehicle: Rear, Left
• Category: Interior Locks & Lock Hardware

Purpose and vehicle placement

The presented actuator is a component from the Internal locks and latches group, dedicated for installation in the rear left part of the vehicle body. It is responsible for transmitting the signal from the central locking system to the mechanical door latch, working in conjunction with the rods, handle, and lock cylinder. Its placement in the rear zone of the vehicle requires maintaining proper geometry and mounting points, which is why using an original component is crucial for the correct operation of the entire system.

Actuator design and function

The lock actuator in this Mercedes model combines the mechanical part and the executive element responsible for the latch movement in a single housing. It is designed to operate in a cycle of repeated locking and unlocking, maintaining stable operating force and repeatable end positions. The appropriate housing design limits the impact of contaminants and moisture, which translates into a longer service life under real-world operating conditions.

In practice, a properly functioning actuator:

• ensures smooth locking and unlocking of the door via the central locking system,
• maintains a stable latch position while driving,
• minimizes the risk of the door opening spontaneously or failing to close properly,
• maintains consistent operation with other locks in the vehicle.

Benefits of using an original Mercedes component

Using an original actuator in a Mercedes W415 allows you to maintain the factory operating parameters of the locking system. Proper fitment for the rear left door eliminates the need for modifications, and the correct mounting points and rod geometry facilitate installation. The original component is designed to work with the vehicle's electronics, which reduces the risk of errors in the comfort system and problems with central locking synchronization.

A used part of this class is a sensible choice for maintenance repairs – it allows for lower service costs while maintaining compliance with factory specifications and predictable lock behavior in daily use.

Condition, verification, and service application

The actuator comes from disassembly and is intended for reinstallation in a vehicle where the factory rear left door lock mechanism has worn out or become damaged. This type of part is particularly useful in situations where symptoms such as the lock not responding to the remote, problems with locking a single door, or unstable latch operation occur. Replacing the complete actuator is a faster and more predictable solution than repairing individual elements inside the mechanism.

Repair expansion and additional materials

If you are planning a comprehensive repair or upgrade of the door lock zone in your Mercedes and need other elements from the same group, such as latching mechanisms, internal door locks, or related actuators, check the available parts in the Mercedes internal locks and latches category.

When planning broader service work and optimizing operating costs, it is also worth using reliable technical materials – a practical comparison of design solutions and repair costs in popular Volkswagen units can be found in the article Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs, which shows how to effectively use used components in daily operation.