Mercedes SLK R171 Door Lock Front Left N/S Latch Catch Mechanism A1717201735

The Left Front Door Lock for Mercedes SLK R171 is an original locking mechanism designed for the factory locking system in the R171 generation SLK model. This component from the locks and latches category ensures the proper operation of the central locking system, stable door closing, and secure vehicle locking.

Specifications and technical data

• SKU: rhd-A1717202735-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1717202735
• Substitutable numbers: A1717202735, A 171 720 27 35, A1717201735, A 171 720 17 35
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Intended Use and Vehicle Placement

The presented lock mechanism is specifically designed for installation in the left front door of the Mercedes SLK R171. Its placement in the front-left area of the body guarantees full compatibility with the factory door construction, window guide, and the electrical system responsible for lock control.

Thanks to its precise fit for the specific side of the vehicle, the lock works in conjunction with the original door handle, linkages, and comfort module, reducing the risk of play, improper closing, or incorrect locking.

Construction and Function of the Lock Mechanism

The left front door lock mechanism in the Mercedes SLK R171 is responsible for several key operational functions:

• mechanical locking and unlocking of the door from the driver's or passenger's side on that side,
• cooperation with the central locking system and body control unit,
• maintaining a stable closed position of the door without excessive play,
• transferring motion from the external and internal door handles to the locking bolt.

The original Mercedes construction ensures proper geometry of the latches and guides, which translates to consistent, reliable door closing and reduced unwanted noises during driving.

Benefits of Using an Original Mercedes SLK R171 Door Lock

Choosing an original left front door lock for the Mercedes SLK R171 is a solution that technically and functionally surpasses many aftermarket alternatives. The most significant advantages include:

• Factory Fitment – the lock is structurally compatible with the SLK R171 doors, facilitating installation and minimizing the need for modifications.
• Proper Electronic Integration – the mechanism is designed to work with the original central locking system and comfort module, reducing the risk of errors and fault messages.
• Stable Locking System Operation – correct meshing of internal components ensures repeatable door closing and opening, without the need for excessive slamming.
• Operational Safety – a functional lock reduces the risk of accidental door opening while driving and problems with locking the vehicle when parked.

Condition, Installation, and Service Application

This part comes from the group of used Mercedes locks and latches, making it an attractive service alternative in case of damage to the factory mechanism. This type of part is particularly useful when the vehicle exhibits symptoms such as:

• no response from the door to central locking commands,
• problems with opening or closing from the handle side,
• irregular locking or unlocking on one side of the vehicle.

Due to its OEM construction, the lock is installed in the left front door at the factory location, using original mounting points and the factory wiring harness. This allows for the preservation of original functionality without altering the door structure.

Compatibility within the Mercedes Locks and Latches Category

If you also need other Mercedes locks and latches for your car, check out the Mercedes locks and latches available in our store to select the appropriate mechanism for the other doors or the trunk lid of your vehicle.

For users who want to better understand the principles of selecting parts by OEM numbers and proper component diagnostics, a guide article on fuel systems may be helpful. Check out practical tips in the material: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, where you will find, among other things, information on identifying parts by numbers and their operational principles.