Mercedes W415 Rear Door Lock System Mechanism Actuator A4157400535

Mercedes W415 Rear Door Lock System Mechanism Actuator is a precision mechanism with an actuator designed for the locking system in the rear part of the vehicle body. It offers stable operation of the locking system, ensuring proper closing and unlocking of the door in cooperation with the central locking system. By maintaining the factory design, the Mercedes W415 Rear Door Lock System Mechanism Actuator allows for a technically correct repair without interfering with the vehicle's original installation.

Specifications and technical data

• SKU: A4157400535
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4157400535
• Substitutable numbers: A4157400535, A 415 740 05 35
• Location on the vehicle: Rear
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock mechanism is a component of the Locks and latches system in Mercedes W415 series models and operates in the rear zone of the body. It is responsible for the mechanical locking and unlocking of the door, working in conjunction with the vehicle's electrical system and central locking control. A properly functioning rear door lock affects:

• secure closing of the door leaf while driving,
• correct response to signals from the remote control or the driver's door lock,
• consistent operation with the interior opening lock (passenger safety features).

Mechanism construction and cooperation with the central locking system

The rear door lock mechanism in the Mercedes W415 integrates a mechanical part with an electric actuator, which enables control from the central locking and comfort systems. The construction is based on the manufacturer's factory design, thanks to which:

• the correct geometry of the catches and rods is maintained,
• the mechanism works with original handles and guides,
• the electrical control is compatible with the installation intended for the W415.

Such a solution reduces the risk of fitment issues and eliminates the need for modifying wiring harnesses or mounts.

Benefits of using the original Mercedes W415 rear lock

Using the original rear lock mechanism in the Mercedes W415 allows for maintaining the consistency of the entire locking system. Key advantages include:

• Factory fitment – the lock is designed for the specific geometry of the door and pillar, which translates into proper fit and latch operation.
• Compatibility with vehicle electronics – the actuator works with central locking control modules without the need for adaptation.
• Stable operation in daily use – correct locking reduces stress on hinges and seals, and minimizes noise resulting from improperly closed doors.

Component condition and service application

The offered lock belongs to the group of used parts, which makes it a cost-effective solution while maintaining the original design. It is a practical choice in situations where it is necessary to replace a damaged lock after a mechanical failure, locking problems, or improper actuator operation. Replacing it with a factory mechanism allows for restoring the correct operation of the rear door leaf without changing the operating characteristics of the entire locking system.

Expanding the lock system in the Mercedes

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other components from the same group, such as additional locking mechanisms, locks for other doors, or related actuators, check the available parts in the Mercedes Locks and latches category.

Practical service tips

When diagnosing lock problems, it is worth paying attention to symptoms such as no response to remote control commands, partial locking of only selected doors, or irregular actuator operation. In many cases, a damaged lock mechanism is one of the elements of a larger comfort system, so when performing extensive vehicle system diagnostics, information on the operation of other components may also be helpful. In the context of general system diagnostics in diesel-powered cars, the article describing the symptoms and consequences of neglecting fuel supply components, available here, may be useful: Diesel injector faults – how to recognize them and what are the risks of neglecting them.