Mercedes C140 Door Lock Front Left N/S Latch Mechanism Actuator A1407206135

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes C140 Door Lock Front Left N/S Latch Mechanism Actuator is an original locking mechanism with a built-in actuator, designed for installation in the front left door of the C140 body. This component belongs to the Doors and door panels group and has been engineered to ensure precise closing, stable locking, and proper integration with the factory central locking system.

Specifications and technical data

• SKU: RHD-A1407206135
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1407206135
• Substitutable numbers: A1407206135, A 140 720 61 35
• Location on the vehicle: Front, Left
• Category: Doors & Door Skins

Purpose and function in the vehicle

The presented lock is dedicated for installation in the front left door of the vehicle, which is crucial for the correct operation of the entire locking system on the driver's or passenger's side, depending on the market version. The mechanism is responsible for:

• mechanical locking and unlocking of the door,
• transferring movement from the external and internal handle,
• cooperation with the central locking actuator,
• maintaining a stable door position while driving.

Thanks to the integrated actuator, the lock ensures consistent operation with the factory electrical installation, which translates into predictable and repeatable performance of the locking system.

Mechanism construction and OEM advantages

The mechanism is constructed as a complete solution including the mechanical part and the actuator responsible for the bolt movement. The original Mercedes design guarantees proper fitment to the door, correct positioning relative to the pillar, and compatibility with factory linkages and the wiring harness.

The main advantages of this solution include:

• factory mounting points, facilitating installation in the door,
• bolt geometry designed for the specific model,
• consistency with the vehicle's safety system,
• reduced risk of play and improper closing after replacement.

Condition, verification, and service application

The item is used, which in practice means it has been removed from a vehicle and verified for suitability for further use. This type of part is particularly useful in situations where:

• the original lock has stopped responding to central locking signals,
• there are problems with closing or accidental door opening,
• mechanical damage has occurred as a result of a collision or attempted break-in,
• a replacement with a part compliant with factory specifications is necessary.

Choosing an original lock from the same model group reduces the risk of fitment issues and minimizes the time required for assembly work.

Benefits of using an original door lock

Using such a mechanism in the C140 body brings measurable operational benefits. Precise cooperation with handles and the central locking system improves daily comfort, and proper locking is important for passenger safety and vehicle protection. Maintaining the factory concept of the locking system is particularly important in high-end cars, where both functionality and the operating culture of the mechanisms matter.

If you are planning a comprehensive repair or modernization of the side body area in your Mercedes and need other components from the same group, such as panels, reinforcements, or complete door structures, check the available parts in the Mercedes Doors and door panels category.

Part selection and additional technical materials

To correctly select a door lock for a specific body version and model year, it is worth using the vehicle identification data and the part manufacturer's markings. This allows you to avoid compatibility problems and speeds up the service process. In the case of premium class vehicles, it is particularly important to use components that comply with factory specifications.

For those interested in a broader approach to selecting original components based on manufacturer markings and vehicle data, the article describing practical methods for selecting used OEM components may be helpful – you can find it here: Audi five-cylinder engine – legend and selection of used OEM parts.