Mercedes SLK R171 Door Lock Front Left N/S Latch Mechanism Actuator A1717202735

Mercedes SLK R171 Door Lock Front Left N/S Latch Mechanism Actuator is an original locking mechanism with a built-in actuator, designed for installation in the front left door of this model. This component belongs to the Locks and latches group, ensuring precise closing and secure locking of the door. Thanks to its factory design, it works seamlessly with the original central locking system and interior vehicle controls.

Specifications and technical data

• SKU: rhd-A1717202735-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1717202735
• Substitutable numbers: A1717202735, A 171 720 27 35
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented lock is dedicated to installation in the front left door of the Mercedes SLK R171 generation. It is responsible for the mechanical locking of the door leaf, interacting with the exterior and interior handles, and transmitting movement from the actuator to the latch mechanism. As a component integrated with the central locking system, it enables synchronized opening and closing of the vehicle via the remote control or the cabin button.

Its placement in the front left area makes it a key component for comfortable vehicle use – especially in daily operation, where the driver's door is used most frequently. A properly functioning lock reduces the risk of incomplete closing, accidental opening, and issues with door locking while driving or parked.

Mechanism construction and integration with the central locking system

The mechanism combines the mechanical part and the components responsible for interacting with the actuator in a single housing. Thanks to this, it:

• ensures stable door locking when closing,
• transmits drive from the central locking system to the locking latch,
• works with handle rods and the internal opening mechanism,
• enables proper operation of the closing and opening functions from the cabin.

The original design intended for the Mercedes SLK R171 guarantees proper fitment with the door panel, guides, and other internal equipment. As a result, installation is straightforward, without the need for modifications or adjustments to the mounts.

Benefits of using an original used lock

Choosing an original front left door lock from dismantling is a reasonable compromise between quality and repair cost. The part retains its factory geometry, appropriate housing rigidity, and compatibility with the electrical and mechanical installation in the Mercedes SLK R171. In practice, this means:

• reliable operation of the central locking and door latch,
• no issues with fitment at the installation point,
• preservation of the original operating characteristics of the handles and lock cylinder,
• reduced risk of noise and play resulting from inaccurate aftermarket replacements.

A used component allows for restoring full door functionality at a lower cost than a new part, while maintaining consistency with the vehicle's factory security system.

Professional installation and practical application

The Mercedes SLK R171 front left door lock is mounted inside the door shell, in the immediate vicinity of the window guide and handle rods. During replacement, it is recommended to remove the door upholstery, disconnect the rods and electrical connectors, and then install the mechanism in the original mounting points. Due to its factory origin, the part works with the existing wiring harness and vehicle controllers, which promotes trouble-free operation after the repair.

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

The impact of original used parts on vehicle value

Using original components from the locks and latches group is important not only for daily comfort but also for the perceived quality of the car during a potential resale. The consistency of the used components with the factory specification reduces the risk of electronics issues, leaks, or improper door closing, which is often verified during vehicle inspections.

To better understand how the selection of original used parts affects the maintenance of a car's value, it is worth reading our guide: Original used parts vs. resale price – how not to lose money?.