Mercedes-Benz W176 W246 Front Left Door Lock Mechanism Actuator A1667200735

Left Front Door Lock Mercedes-Benz W176/W246 is an original locking mechanism with an actuator, designed for installation in the front left door of vehicles in this series. This element from the locks and latches category ensures proper locking, unlocking, and cooperation with the factory central locking system, restoring full functionality to the driver's door.

Specifications and technical data

• SKU: rhd-A1667200735-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667200735
• Substitutable numbers: A1667200735, A 166 720 07 35, A2040085899, A 204 008 58 99, KZ
• Location on the vehicle: Front, Left
• Category: Exterior Locks & Lock Hardware

Purpose and Function of the Left Front Door Lock

The presented mechanism is dedicated to the front left door in Mercedes-Benz A-Class (W176) and B-Class (W246) models. It is responsible for the mechanical locking of the door leaf, cooperation with the external and internal door handles, and integration with the central locking system and remote control. Thanks to its precise fit to the door structure, it ensures stable latch guidance and repeatable operation with every opening and closing cycle.

Construction and Advantages of the Original Mechanism

The lock mechanism combines a mechanical part and an actuator unit in one housing, allowing for precise control by the vehicle's electrical system. The applied OEM construction guarantees:

• compatibility with the factory Mercedes-Benz central locking system,
• correct positioning relative to the guides and striker plate on the pillar,
• proper cooperation with the handle rods and internal lock,
• maintenance of factory operating parameters in terms of locking force and time.

This allows for seamless integration with the vehicle's existing system, without the need for modifications to the wiring harness or mounting elements.

Vehicle Placement and Installation Aspects

The element is designed for installation in the front – left side of the vehicle, i.e., the driver's door in left-hand drive versions. The lock's construction is adapted to the door's geometry and factory mounting points, which facilitates service installation and reduces replacement time. In practice, this means:

• the possibility of using factory screws and strikers,
• correct routing of rods and cables within the door,
• easier diagnostics in case of potential central locking malfunctions.

Before installation, it is recommended to verify compatibility with the specific body version and compare the construction with the removed element to ensure full compatibility with the vehicle's system.

Product Condition and Service Application

The mechanism comes from the group of used locks and latches, making it an attractive service solution in case of factory lock failure, locking problems, or incorrect operation of the central locking system on the driver's side. Replacing it with an original element of this type helps to reduce repair costs while maintaining proper compatibility with the vehicle's safety and comfort systems.

Selecting the Right Lock and Additional Materials

When selecting a door lock for a Mercedes, it is crucial to check compatibility with the manufacturer's designations and interchangeable numbers in the service documentation. This helps to avoid installation problems and ensure correct cooperation with the vehicle's electronics. If you need other Mercedes locks and latches, check availability in our dedicated category: Mercedes locks and latches.

If you are planning a broader vehicle upgrade – not only in the area of doors and locks, but also the interior – it is worth reading the guide on our blog. You will find inspiration for using used equipment elements in the article Car Interior Tuning with Global Parts, which shows how to effectively combine functionality with a reasonable budget.