Door Lock Mercedes W245 Rear Left Latch Mechanism Actuator A1697302135

Door Lock Mercedes W245 Rear Left Latch Mechanism Actuator is a component from the Locks and Latches group, designed for the rear left door panel of the Mercedes B-Class W245 body. It enables the proper operation of the locking mechanism, ensuring secure closing and stable retention of the door while driving.

Specifications and technical data

• SKU: A1697303135-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1697303135
• Substitutable numbers: A1697303135, A 169 730 31 35, A1697302135, A 169 730 21 35, KZ
• Location on the vehicle: Rear, Left
• Category: Exterior Locks & Lock Hardware

Purpose and function of the door lock

The presented lock is responsible for the mechanical locking of the rear left door panel and works in conjunction with the factory opening and closing system in the Mercedes W245. A correctly selected component allows for maintaining body tightness, door stability in the guides, and the proper operation of both the interior and exterior door handles.

Its location in the rear – left side of the vehicle zone means the lock operates under demanding conditions (frequent opening, exposure to dirt and moisture), which is why its efficiency has a direct impact on the daily comfort of using the car.

Benefits of using an original Mercedes lock

Using a lock dedicated to a specific body model ensures:

• factory fitment to the door structure and mounting points,
• proper cooperation with the handle mechanism and linkages,
• correct operation of the central locking system (if present in the vehicle),
• stable closing without the need for additional adjustments.

Thanks to this, replacing a damaged component with an original lock from the Mercedes group allows for restoring the factory operating parameters of the door mechanism without interfering with the body structure.

Condition, fitment, and installation

The offered door lock is a used component, which in practice means a favorable cost-to-functionality ratio while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a standard inspection of the mechanism and ensure the correct setting of linkages and guides to ensure smooth locking and unlocking.

It is worth basing the selection of parts on vehicle data and manufacturer markings, which minimizes the risk of mismatch and facilitates installation in the rear left door zone. A properly selected lock shortens service time and reduces the need for additional adjustments after installation.

Application in the body safety system

A functional door lock in a Mercedes W245 is important not only for utility but also for passenger safety. It is responsible for keeping the door in the closed position while driving, as well as for proper cooperation with locking systems, which is especially important when transporting passengers in the rear seat.

Regular inspection of the condition of locks and latches and the replacement of worn components helps reduce the risk of closing problems, hinge play, or improper locking, which can lead to uncomfortable or unsafe vehicle operation.

Expanding the lock system in your Mercedes

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as locking mechanisms, cylinders, or additional locking modules, check the available parts in the Mercedes Locks and Latches category.

More about choosing used parts

When selecting components such as a rear door lock, it is worth consciously comparing original, replacement, and used solutions in terms of cost, quality, and fitment based on manufacturer numbers. The Global Parts guide may be helpful – Original, replacement, or used – which car parts are the most cost-effective?, where you will find practical comparisons and answers to the most frequently asked questions regarding the selection of body components.