Mercedes R170 Door Lock Latch Mechanism Actuator Left N/S A1707200335

Mercedes R170 Door Lock Latch Mechanism Actuator Left N/S is a factory-original component from the Locks and Latches group, designed for installation on the left side of the vehicle body. It ensures the proper operation of the central locking system, secure door latching, and stable integration with the vehicle's factory electrical installation. This is a practical solution for users looking to restore proper door functionality without the costly replacement of the entire lock set.

Specifications and technical data

• SKU: rhd-A1707200335
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1707200335
• Substitutable numbers: A1707200335, A 170 720 03 35
• Location on the vehicle: Left
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The presented mechanism is dedicated to installation on the left side of the vehicle, which is crucial for both proper alignment with the door panel and compatibility with the handle rods and lock cylinder. The component is responsible for:

• mechanical locking and unlocking of the driver or passenger door on the left side,
• integration with the central locking system and remote control operation,
• correct positioning of the latch tongue relative to the body pillar,
• stable retention of the door in the closed position while driving.

By maintaining the original Mercedes design, the mechanism ensures correct operating geometry, which reduces the risk of door rattling, play, or insecure closing.

Construction and technical compatibility

The Mercedes R170 Door Lock Latch Mechanism Actuator Left N/S has been designed as a complete solution combining the mechanical part with an electric actuator. This means it is compatible with the factory wiring and comfort control modules used in Mercedes R170 models. The use of the original design translates into:

• correct positioning of mounting points relative to the door,
• proper routing of internal and external handle rods,
• compatibility with factory electrical connectors,
• adherence to the actuator operating characteristics specified by the manufacturer.

Such a solution facilitates installation and minimizes the need for modifications, which is particularly important when servicing vehicles equipped with advanced comfort systems.

Condition, origin, and benefits of use

The offered mechanism is a dismantled, pre-owned part, which allows for a reasonable repair cost while maintaining the manufacturer's original specifications. Compared to low-quality replacements, using a factory solution ensures:

• better fitment to the door structure,
• stable operation with the central locking system,
• reduction of issues with incomplete locking or spontaneous opening,
• consistency with other locking system components in the vehicle.

For workshops and private users, this means shorter installation time and a lower risk of needing to re-intervene in the lock system.

Practical installation and maintenance tips

When replacing the Mercedes R170 Door Lock Latch Mechanism Actuator Left N/S, it is worth checking the condition of the rods, handles, and door seals to avoid the need for disassembly in the near future. It is also recommended to:

• check the door alignment relative to the body after installation,
• verify the operation of the central locking system via remote and key,
• check the operation of the child safety lock (if present in the vehicle configuration),
• gently lubricate moving parts according to the manufacturer's recommendations.

This approach allows for restoring vehicle comfort and reducing noise and play within the door area.

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

If you want to better understand the specifics of used electrical and electronic components in a car, including the principles of selection based on manufacturer markings and practical aspects of installation, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.