Mercedes W177 Front Door Right O/S Lock Mechanism Linkage A0997203202

Description

Mercedes W177 Front Door Right O/S Lock Mechanism Linkage is an original locking mechanism designed for installation on the passenger side. This component is responsible for precise locking and unlocking of the door, ensuring proper operation with the handle, linkages, and the vehicle’s electrical system. As part of the Locks and Latches group, it is a key component of the body locking system in Mercedes compact class models.

Specifications and technical data

• SKU: rhd-A0997203202
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0997203202
• Substitutable numbers: A0997203202, A 099 720 32 02, A1770032899, A 177 003 28 99
• Location on the vehicle: Front, Right
• Category: Exterior Locks & Lock Hardware

Purpose and function in the vehicle

The front right door lock mechanism in the Mercedes W177 is responsible for controlling access to the cabin on the passenger side. It is integrated with the locking system and works with linkages and other door components, enabling:

• stable closing of the door panel during every opening and closing cycle,
• proper operation of the central locking function,
• mechanical unlocking of the door from both the inside and outside,
• secure retention of the door in the closed position while driving.

Thanks to its fitment for the specific W177 body model, the lock maintains the correct mounting geometry and compatibility with factory door guides and seals.

Construction and technical characteristics

The presented lock mechanism is a design dedicated to installation on the front right side of the vehicle. The internal system is based on a set of latches, levers, and linkages that transfer movement from the outer and inner handles to the lock tongue. This solution ensures:

• consistent operation with the factory Mercedes locking system,
• adequate rigidity of mechanical connections,
• smooth operation while maintaining the correct door closing force.

As an original Mercedes part, the lock is designed for compatibility with factory W177 doors, which reduces the risk of play, leaks, or improper fitment.

Selection and compatibility

To correctly select the lock mechanism for a specific vehicle, it is worth paying attention to:

• compatibility with the W177 body and the mounting side (front, right),
• intended use for front doors, not rear doors,
• presence of appropriate mounting points and sockets that work with the linkages.

The product has an assigned OEM part number and interchangeable numbers, which facilitates verification of compliance with factory service documentation and parts catalogs. Additionally, identification in the store is supported by the SKU designation, allowing for quick searching of the correct lock variant.

Condition, application, and benefits of installation

The offered lock mechanism is a used product, which is a cost-effective solution for users looking for original components at a reasonable price. Compared to non-factory replacements, the original Mercedes W177 front right door lock ensures:

• preservation of the factory operating characteristics of handles and locking,
• better fit to the door structure and paneling,
• consistency with other elements of the vehicle’s locking system.

Thanks to its dedicated placement on the vehicle, installation is straightforward, without the need for structural modifications. This is a practical solution when replacing a damaged lock after a collision, due to operational wear, or issues with locking on the passenger side.

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

If you are considering broader use of components from the secondary market and want to better understand when used subassemblies are a reasonable choice, take a look at the article Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, where you will find practical tips on selecting used parts.