Mercedes W415 Rear Door Lock System Mechanism Actuator A4157400535

Mercedes W415 Rear Door Lock System Mechanism Actuator is a precision mechanism from the Locks and latches category, responsible for securely locking and unlocking the rear doors of the vehicle. This complete mechanism with an actuator ensures stable operation with the factory central locking system, maintaining proper performance and safety parameters. This solution is intended for users expecting a proven, original design tailored to the specifics of the Mercedes W415 series models.

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 rear door lock mechanism has been designed to operate in the rear section of the body, where it is responsible for controlling the closing, opening, and locking of the door leaf. The integrated actuator works with the vehicle's electrical system, allowing control via remote, internal buttons, or the key, depending on the specific vehicle configuration.

Thanks to the factory design, the lock maintains the correct geometry of the catches and levers, which translates into smooth door closing, proper positioning relative to the body, and a reduction in play and unwanted noises while driving.

Mechanism construction and integration with the central locking system

The mechanism consists of a mechanical part responsible for locking and a drive part (actuator) that performs the closing and opening movement based on signals from the electrical system. This design allows for:

• consistent cooperation with the factory central locking and vehicle electronics,
• maintaining the appropriate pressure force of the latch against the pillar catch,
• stable operation under typical passenger car operating conditions.

The original design intended for the Mercedes minimizes the risk of compatibility issues, such as incomplete locking, actuator operation errors, or incorrect door positioning.

Benefits of using an original rear door lock

Using a dedicated rear door lock in a Mercedes W415 provides a number of practical operational benefits:

• Consistency with the factory safety system – the mechanism works with existing sensors and controllers, which facilitates maintaining the correct operation of the locking function.
• Proper mounting fit – the spacing of the mounts and the kinematics of the levers are consistent with the door design, which speeds up installation and reduces the need for adjustments.
• Stable actuator operation – the actuator is adapted to the loads and range of motion provided by the vehicle manufacturer.

This solution will work well both when replacing a damaged lock and when restoring the full functionality of the central locking system after a mechanical or electrical failure.

Condition, origin, and service application

The offered item is in used condition, which means it has been dismantled and was previously operated in a vehicle. This type of part is an attractive alternative to new components, allowing for reduced repair costs while maintaining the original design and proper fit for the Mercedes W415 rear door.

The mechanism is particularly useful in situations where symptoms occur such as problems with locking, no response to the remote signal, irregular door opening, or mechanical damage to the lock after a collision or intensive use.

Integration with other body elements and further modernization possibilities

The rear door lock works with handles, rods, seals, and body electronics, creating a cohesive system responsible for user comfort and safety. Replacing this element is often a key stage in comprehensive door zone maintenance, which also includes adjusting hinges, checking the condition of wires in grommets, and controlling the operation of control modules.

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

For users interested in a conscious approach to vehicle operation and the use of recycled parts to reduce costs and environmental impact, it is worth reading the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts, which discusses the practical aspects of such an approach.